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Journal articles on the topic 'Helens'

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Published: 4 June 2021
Last updated: 5 February 2022

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1

Calderazzo, J. "Mount St. Helens." Interdisciplinary Studies in Literature and Environment 14, no. 1 (January 1, 2007): 237–40. http://dx.doi.org/10.1093/isle/14.1.237.

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2

Martí Mus, Mónica, Lennart Jeppsson, and John M. Malinky. "A complete reconstruction of the hyolithid skeleton." Journal of Paleontology 88, no. 1 (January 2014): 160–70. http://dx.doi.org/10.1666/13-038.

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Hyolithids are a group of Paleozoic lophotrochozoans with a four-pieced skeleton consisting of a conch, an operculum, and a pair of lateral ‘spines' named helens. Both the conch and operculum are relatively well known and, to a certain extent, have modern analogues in other lophotrochozoan groups. The helens, on the other hand, are less well known and do not have clear modern analogues. This has hindered the knowledge of the complete morphology of the hyolithid skeleton, as well as other aspects of hyolithid biology, such as the organization of soft parts, and their ability to move. The material studied herein, consisting of disarticulated skeletal elements from the Silurian of Gotland, Sweden, illustrates a complete developmental sequence of a hyolithid species and includes the first complete, three-dimensionally preserved helens. Our material confirms that helens were massive skeletal elements, whose growth started proximally with the deposition of a central, coherent lamella. Further shell accretion took place around this lamella, but followed a particular accretion pattern probably constrained by the presence of marginal muscle attachment sites on the proximal-most portion of the helens. These muscle attachment sites were ideally located to allow a wide range of movements for the helens, suggesting that hyolithids may have been relatively mobile organisms.
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3

Nikoloutsos, Konstantinos P. "FROM TEXT TO SCREEN: CELLULOID HELENS AND FEMALE STARDOM IN THE 1950s." Cambridge Classical Journal 61 (August 17, 2015): 70–90. http://dx.doi.org/10.1017/s175027051500007x.

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This paper investigates the visual recreation of Helen in the medium of cinema by using as case studies two runaway productions of the 1950s:L'amante di Paridestarring Hedy Lamarr andHelen of Troywith Rosanna Podestà in the title role. Examination of features such as costumes, makeup and hairstyle shows that in the former film Helen's representation is informed by and seeks to capitalize on Lamarr's status as a queen of glamour, equating Greek royalty with Hollywood royalty. The analysis of the second film explores further the homology between ancient and modern celebrity on screen and in extra-cinematic discourses, and shows how Podestà's stardom was built on and remained anchored in Helen's iconicity.
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4

Dzurisin, Daniel, James W. Vallance, Terrance M. Gerlach, Seth C. Moran, and Stephen D. Malone. "Mount St. Helens reawakens." Eos, Transactions American Geophysical Union 86, no. 3 (2005): 25. http://dx.doi.org/10.1029/2005eo030001.

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5

Lovett, R. A. "ECOLOGY:Mount St. Helens, Revisited." Science 288, no. 5471 (June 2, 2000): 1578–79. http://dx.doi.org/10.1126/science.288.5471.1578.

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6

del Moral, R., and B. Magnússon. "Surtsey and Mount St. Helens: a comparison of early succession rates." Biogeosciences 11, no. 7 (April 14, 2014): 2099–111. http://dx.doi.org/10.5194/bg-11-2099-2014.

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Abstract. Surtsey and Mount St. Helens are celebrated but very different volcanoes. Permanent plots allow for comparisons that reveal mechanisms that control succession and its rate and suggest general principles. We estimated rates from structure development, species composition using detrended correspondence analysis (DCA), changes in Euclidean distance (ED) of DCA vectors, and by principal components analysis (PCA) of DCA. On Surtsey, rates determined from DCA trajectory analyses decreased as follows: gull colony on lava with sand > gull colony on lava, no sand ≫ lava with sand > sand spit > block lava > tephra. On Mount St. Helens, plots on lahar deposits near woodlands were best developed. The succession rates of open meadows declined as follows: Lupinus-dominated pumice > protected ridge with Lupinus > other pumice and blasted sites > isolated lahar meadows > barren plain. Despite the prominent contrasts between the volcanoes, we found several common themes. Isolation restricted the number of colonists on Surtsey and to a lesser degree on Mount St. Helens. Nutrient input from outside the system was crucial. On Surtsey, seabirds fashioned very fertile substrates, while on Mount St. Helens wind brought a sparse nutrient rain, then Lupinus enhanced fertility to promote succession. Environmental stress limits succession in both cases. On Surtsey, bare lava, compacted tephra and infertile sands restrict development. On Mount St. Helens, exposure to wind and infertility slow succession.
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7

del Moral, R., and B. Magnússon. "Surtsey and Mount St. Helens: a comparison of early succession rates." Biogeosciences Discussions 10, no. 12 (December 10, 2013): 19409–48. http://dx.doi.org/10.5194/bgd-10-19409-2013.

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Abstract. Surtsey and Mount St. Helens are celebrated, but very different volcanoes. Permanent plots allow comparisons that reveal mechanisms that control succession and its rate and suggest general principles. We estimated rates from structure development, species composition using detrended correspondence analysis (DCA), changes in Euclidean distance (ED) of DCA vectors and by principal components analysis (PCA) of DCA. On Surtsey, rates determined from DCA trajectory analyses decreased as follows: gull colony on lava with sand > gull colony on lava, no sand ≫ lava with sand > sand spit > block lava > tephra. On Mount St. Helens, plots on lahar deposits near woodlands were best developed. The succession rates of open meadows declined as follows: Lupinus-dominated pumice > protected ridge with Lupinus > other pumice and blasted sites > isolated lahar meadows > barren plain. Despite the prominent contrasts between the volcanoes, common themes were revealed. Isolation restricted the number of colonists on Surtsey and to a lesser degree on Mount St. Helens. Nutrient input from outside the system was crucial. On Surtsey, seabirds fashioned very fertile substrates, while on Mount St. Helens wind brought a sparse nutrient rain, then Lupinus enhanced fertility to promote succession. Environmental stress limits succession in both cases. On Surtsey, bare lava, compacted tephra and infertile sands restrict development. On Mount St. Helens, exposure to wind and infertility slow succession.
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8

Hedley, Iain, and Ian Scott. "The St Helens Iron Foundry." Industrial Archaeology Review 21, no. 1 (June 1999): 53–59. http://dx.doi.org/10.1179/iar.1999.21.1.53.

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9

Major, Jon J. "Mount St. Helens at 40." Science 368, no. 6492 (May 14, 2020): 704–5. http://dx.doi.org/10.1126/science.abb4120.

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10

Rowe, Michael C., John S. Pallister, and Anita Grunder. "Mount St. Helens Petrology Workshop." Eos, Transactions American Geophysical Union 88, no. 2 (January 9, 2007): 15. http://dx.doi.org/10.1029/2007eo020004.

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11

Palacios, David. "Shoestring Glacier: Seventeen years later, Mount St. Helens, USA." Zeitschrift für Geomorphologie 43, no. 2 (July 9, 1999): 129–53. http://dx.doi.org/10.1127/zfg/43/1999/129.

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12

Busacca, Alan J., Kevin T. Nelstead, Eric V. McDonald, and Michael D. Purser. "Correlation of Distal Tephra Layers in Loess in the Channeled Scabland and Palouse of Washington state." Quaternary Research 37, no. 3 (May 1992): 281–303. http://dx.doi.org/10.1016/0033-5894(92)90067-s.

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AbstractThirty-two distal tephra layers that are interbedded in Quaternary loess at 13 sites in the Channeled Scabland and Palouse were sampled as part of a regional study of the stratigraphy and chronology of dominantly windblown sediments on the Columbia Plateau. An electron microprobe was used to determine the elemental composition of volcanic glass in all of the samples and also to determine the composition of ilmenite in 14 of them. Two of the distal tephra layers correlate with Glacier Peak eruptions (11,200 yr B.P.), five with Mount St. Helens tephra set S (13,000 yr B.P.), and nine with Mount St. Helens tephra set C (ca. 36,000 yr B.P.) based on analysis of glass and ilmenite in reference pumices from Glacier Peak, Mount St. Helens, Mount Mazama, Mount Rainier, and Mount Jefferson, on the calculation of similarity coefficients for comparisons of both glass and ilmenite reference compositions with those of distal tephras, and on considerations of stratigraphic position. The composition of glass and ilmenite and the stratigraphic position of one distal tephra layer in the loess suggests that it is from an eruption of Mount St. Helens at least several thousand years older than the set C eruptions. Glass composition and stratigraphic position of a distal tephra at another site in loess suggested a possible correlation with some layers of the Pumice Castle eruptive sequence at Mount Mazama (ca. 70,000 yr B.P.), but similarity coefficients on ilmenite of only 45 and 48 fail to support the correlation and show why multiple correlation methods should be used. Similarity coefficients higher than 96 for both glass and ilmenite establish a correlation with Mount St. Helens layer Cw for distal layers in two widely separated sites. These layers are in sedimentary successions that are closely associated with giant floods in the Channeled Scabland. The 36,000 yr B.P. radiocarbon age of the Mount St. Helens set C establishes a minimum limiting date for an episode of flooding that predates the widespread late Wisconsin floods. A correlation of distal tephra layers at two other sites in the Scabland and Palouse establishes a chronostratigraphic link to a still-older episode of flooding within the Brunhes Normal Polarity Chron. Six distal tephra layers in pre-late Quaternary loess that are not correlated with known or dated eruptions have compositions and distinctive stratigraphic positions relative to magnetic reversal boundaries that make them key markers for future work.
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13

Weisburd, S. "Birthday Booms at Mt. St. Helens." Science News 127, no. 24 (June 15, 1985): 373. http://dx.doi.org/10.2307/3969454.

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14

Skovsted, Christian B., Mónica Martí Mus, Zhiliang Zhang, Bing Pan, Luoyang Li, Fan Liu, Guoxiang Li, and Zhifei Zhang. "On the origin of hyolith helens." Palaeogeography, Palaeoclimatology, Palaeoecology 555 (October 2020): 109848. http://dx.doi.org/10.1016/j.palaeo.2020.109848.

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15

Nash, Steve. "Making Sense of Mount St. Helens." BioScience 60, no. 8 (September 2010): 571–75. http://dx.doi.org/10.1525/bio.2010.60.8.3.

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16

Yamaguchi, David. "Curved saplings at Mt St Helens." Nature 357, no. 6378 (June 1992): 448–49. http://dx.doi.org/10.1038/357448b0.

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17

Waitt, Richard B. "Curved saplings at Mt St Helens." Nature 357, no. 6378 (June 1992): 449. http://dx.doi.org/10.1038/357449a0.

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18

Katzoff, Judith A. "Dome building at Mount St. Helens." Eos, Transactions American Geophysical Union 66, no. 28 (1985): 537. http://dx.doi.org/10.1029/eo066i028p00537-02.

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19

BURSIK, MARCUS I., and ANDREW W. WOODS. "Curved saplings at Mount St Helens." Nature 355, no. 6361 (February 1992): 594. http://dx.doi.org/10.1038/355594a0.

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20

WALTHAM, TONY. "Excursion guide 11: Mount St Helens." Geology Today 11, no. 6 (November 1995): 228–33. http://dx.doi.org/10.1111/j.1365-2451.1995.tb00118.x.

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21

Blanchard, David O. "“Ash Devils” Near Mount St. Helens." Bulletin of the American Meteorological Society 67, no. 5 (May 1986): 535–36. http://dx.doi.org/10.1175/1520-0477-67.5.535.

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22

Swanson, Eleanor. "Standing Dead Zone: Mount St. Helens." Interdisciplinary Studies in Literature and Environment 22, no. 2 (May 14, 2015): 413–18. http://dx.doi.org/10.1093/isle/isv031.

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23

Gleeson, Matthew. "Mount St Helens 40 years on." Nature Reviews Earth & Environment 1, no. 6 (May 18, 2020): 283. http://dx.doi.org/10.1038/s43017-020-0059-5.

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24

Newhall, C. G. "VOLCANOLOGY:Enhanced: Mount St. Helens, Master Teacher." Science 288, no. 5469 (May 19, 2000): 1181–83. http://dx.doi.org/10.1126/science.288.5469.1181.

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25

Beaudoin, A. B., and R. H. King. "Using discriminant function analysis to identify Holocene tephras based on magnetite composition: a case study from the Sunwapta Pass area, Jasper National Park." Canadian Journal of Earth Sciences 23, no. 6 (June 1, 1986): 804–12. http://dx.doi.org/10.1139/e86-082.

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The magnetite composition from three sets of samples of Mazama, St. Helens set Y, and Bridge River tephras from Jasper and Banff national parks are used to test whether discriminant function analysis can unambiguously distinguish these tephras. The multivariate method is found to be very sensitive to the change in reference samples. St. Helens set Y tephra is clearly distinguished. However, discrimination between Mazama and Bridge River tephras is less distinct. A set of unknown tephras from the Sunwapta Pass area was used to test the classification schemes. Unknown tephras are assigned to different tephra types depending on which reference tephra set is used in the discriminant function analysis.
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26

WILSON, ELIZABETH. "Mount St. Helens Quiets, But May Reawaken." Chemical & Engineering News Archive 82, no. 41 (October 11, 2004): 14. http://dx.doi.org/10.1021/cen-v082n041.p014a.

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27

Poole, Kathy. "MOUNT ST. HELENS: PHOTOGRAPHS BY FRANK GOHLKE." Landscape Journal 13, no. 2 (1994): 184–87. http://dx.doi.org/10.3368/lj.13.2.184.

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28

Smith, Diane R., and William P. Leeman. "Petrogenesis of Mount St. HElens dacitic magmas." Journal of Geophysical Research: Solid Earth 92, B10 (September 10, 1987): 10313–34. http://dx.doi.org/10.1029/jb092ib10p10313.

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29

P., R. "A fresh start for Mount St Helens." Nature 348, no. 6300 (November 1990): 391. http://dx.doi.org/10.1038/348391b0.

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30

Finn, Carol, and David L. Williams. "An aeromagnetic study of Mount St. Helens." Journal of Geophysical Research: Solid Earth 92, B10 (September 10, 1987): 10194–206. http://dx.doi.org/10.1029/jb092ib10p10194.

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31

Smith, Diane R., and William P. Leeman. "The origin of Mount St. Helens andesites." Journal of Volcanology and Geothermal Research 55, no. 3-4 (March 1993): 271–303. http://dx.doi.org/10.1016/0377-0273(93)90042-p.

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32

Service, Robert F. "Researchers decry planned road near St. Helens." Science 372, no. 6540 (April 22, 2021): 328–29. http://dx.doi.org/10.1126/science.372.6540.328.

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33

Lennon, M. A., S. Jones, and S. M. Woodward. "Some Operational Aspects of School-Milk Fluoridation in St. Helens, Merseyside, UK." Advances in Dental Research 9, no. 2 (July 1995): 118–19. http://dx.doi.org/10.1177/08959374950090020601.

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St. Helens is a small industrial town situated about 20 km east of Liverpool. It lies in an area of social deprivation and, by UK standards, dental caries experience is high (e.g., dmft at 5 years = 2.8; DMFT at 12 years = 2.7). Water fluoridation is an important part of the government's strategy for improving oral health in such areas; however, in large parts of St. Helens, implementation of water fluoridation is complicated by reason of the multiple sources of water supply. The aims of the St. Helens study are therefore to examine the technical, organizational, and legal aspects of the fluoridation of school milk as an alternative public health approach. In the UK, children attending nursery units (kindergartens) from ages 2-4 years and infant schools from ages 4-7 years are eligible for 189 mL of milk to be consumed each day at school. These two schemes are funded or subsidized by the Departments of Health (UK) or the European Community, respectively. A preliminary review of the possibility of using school milk as a vehicle for fluoride has been published recently (Jones et al., 1992). The current paper will review progress over the past 12 months, including the response of schools, dairies, and other organizational considerations.
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34

Shiga, David. "Is a supervolcano brewing beneath Mount St Helens?" New Scientist 202, no. 2712 (June 2009): 10. http://dx.doi.org/10.1016/s0262-4079(09)61547-5.

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35

Kennedy, L. A., J. K. Russell, and E. Nelles. "Origins of Mount St. Helens cataclasites: Experimental insights." American Mineralogist 94, no. 7 (June 30, 2009): 995–1004. http://dx.doi.org/10.2138/am.2009.3129.

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36

Dahlgren, R. A., F. C. Ugolini, and W. H. Casey. "Field weathering rates of Mt. St. Helens tephra." Geochimica et Cosmochimica Acta 63, no. 5 (March 1999): 587–98. http://dx.doi.org/10.1016/s0016-7037(99)00067-8.

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37

Lang, Theodore E., and Jimmie D. Dent. "Kinematic Properties of Mudflows on Mt. St. Helens." Journal of Hydraulic Engineering 113, no. 5 (May 1987): 646–60. http://dx.doi.org/10.1061/(asce)0733-9429(1987)113:5(646).

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38

Matoza, Robin S., Michael A. H. Hedlin, and Milton A. Garcés. "An infrasound array study of Mount St. Helens." Journal of Volcanology and Geothermal Research 160, no. 3-4 (February 2007): 249–62. http://dx.doi.org/10.1016/j.jvolgeores.2006.10.006.

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39

Reed, Jack W. "Air pressure waves from Mount St. Helens eruptions." Journal of Geophysical Research 92, no. D10 (1987): 11979. http://dx.doi.org/10.1029/jd092id10p11979.

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40

MUS, M. MARTÍ, and J. BERGSTRÖM. "SKELETAL MICROSTRUCTURE OF HELENS, LATERAL SPINES OF HYOLITHIDS." Palaeontology 50, no. 5 (September 2007): 1231–43. http://dx.doi.org/10.1111/j.1475-4983.2007.00700.x.

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41

Nassau, Kurt. "Green Glass Made of Mount Saint Helens Ash?" Gems & Gemology 22, no. 2 (June 1, 1986): 103–4. http://dx.doi.org/10.5741/gems.22.2.103.

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42

Weaver, Craig S., Wendy C. Grant, and Julie E. Shemeta. "Local crustal extension at Mount St. Helens, Washington." Journal of Geophysical Research: Solid Earth 92, B10 (September 10, 1987): 10170–78. http://dx.doi.org/10.1029/jb092ib10p10170.

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43

Ball, Philip. "Mount St Helens growls again." Nature, October 1, 2004. http://dx.doi.org/10.1038/news040927-22.

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44

Evans Ogden, Lesley. "GeoGirls: Confidence Erupts from a Camp at a Volcano." Eos 101 (April 22, 2020). http://dx.doi.org/10.1029/2020eo142740.

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45

"Report on St. Helens (United States)." Bulletin of the Global Volcanism Network 20, no. 9 (1995). http://dx.doi.org/10.5479/si.gvp.bgvn199509-321050.

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46

"Report on St. Helens (United States)." Bulletin of the Global Volcanism Network 20, no. 11 (1995). http://dx.doi.org/10.5479/si.gvp.bgvn199512-321050.

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47

"Report on St. Helens (United States)." Bulletin of the Global Volcanism Network 21, no. 6 (1996). http://dx.doi.org/10.5479/si.gvp.bgvn199606-321050.

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48

"Report on St. Helens (United States)." Bulletin of the Global Volcanism Network 23, no. 5 (1998). http://dx.doi.org/10.5479/si.gvp.bgvn199805-321050.

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49

"Report on St. Helens (United States)." Bulletin of the Global Volcanism Network 23, no. 6 (1998). http://dx.doi.org/10.5479/si.gvp.bgvn199806-321050.

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50

"Report on St. Helens (United States)." Bulletin of the Global Volcanism Network 23, no. 7 (1998). http://dx.doi.org/10.5479/si.gvp.bgvn199807-321050.

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