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Journal articles on the topic 'Claycop'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Gigante, Barbara, Angela O. Prazeres, Maria J. Marcelo-Curto, Andre Cornelis, and Pierre Laszlo. "Mild and Selective Nitration by Claycop." Journal of Organic Chemistry 60, no. 11 (1995): 3445–47. http://dx.doi.org/10.1021/jo00116a034.

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2

Saraswati, Kanodia, and Chander Thapliyal Prakash. "Regioselective mononitration of coumarins using claycop reagent." Journal of Indian Chemical Society Vol. 88, Feb 2011 (2011): 241–44. https://doi.org/10.5281/zenodo.5773455.

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Department of Chemistry, University of Delhi, Delhi-110 007, India Organic Building Materials Division, Central Building Research Institute, Roorkee-247 667, Uttaranchal, India <em>E-mail</em> : pct866@yahoo.com <em>Manuscript received 16 November 2009, revised 04 May 2010, accepted 14 June 2010</em> Coumarins arc nitrated by claycop (cupric nitrate Impregnated on the K1O montmorillonite) in acetic anhldride at room temperature to give corresponding regloselective mononitro coumarins in good to excellent yields. Among the products three nitrocoumarins are new.

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3

GIGANTE, B., A. O. PRAZERES, M. J. MARCELO-CURTO, A. CORNELIS, and P. LASZLO. "ChemInform Abstract: Mild and Selective Nitration by “Claycop”." ChemInform 26, no. 44 (2010): no. http://dx.doi.org/10.1002/chin.199544086.

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4

Lancaster, N. Llewellyn, Roy B. Moodie, and John P. B. Sandall. "The efficacy of ‘Claycop’ in the dinitration of toluene." Journal of the Chemical Society, Perkin Transactions 2, no. 5 (1997): 847–48. http://dx.doi.org/10.1039/a701226h.

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5

Mesheram, Harashadas M., Srinivas Dale, and J. S. Yadav. "A general synthesis of isothiocyanates from dithiocarbamates using Claycop." Tetrahedron Letters 38, no. 50 (1997): 8743–44. http://dx.doi.org/10.1016/s0040-4039(97)10158-7.

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6

Kanodia, Saraswati, and Prakash Chander Thapliyal. "ChemInform Abstract: Regioselective Mononitration of Coumarins Using Claycop Reagent." ChemInform 43, no. 3 (2011): no. http://dx.doi.org/10.1002/chin.201203128.

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7

MESHERAM, H. M., S. DALE, and J. S. YADAV. "ChemInform Abstract: A General Synthesis of Isothiocyanates from Dithiocarbamates Using Claycop." ChemInform 29, no. 10 (2010): no. http://dx.doi.org/10.1002/chin.199810053.

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8

Mallouk, Siham, Khalid Bougrin, Hayat Doua, Rachid Benhida, and Mohamed Soufiaoui. "Ultrasound-accelerated aromatisation of trans - and cis -pyrazolines under heterogeneous conditions using claycop." Tetrahedron Letters 45, no. 21 (2004): 4143–48. http://dx.doi.org/10.1016/j.tetlet.2004.03.144.

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9

Varma, Rajender S. "Solvent-free accelerated organic syntheses using microwaves." Pure and Applied Chemistry 73, no. 1 (2001): 193–98. http://dx.doi.org/10.1351/pac200173010193.

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A solvent-free approach for organic synthesis is described which involves microwave (MW) exposure of neat reactants (undiluted) either in the presence of a catalyst or catalyzed by the surfaces of inexpensive and recyclable mineral supports such as alumina, silica, clay, or "doped" surfaces, namely, Fe(NO3)3-clay (clayfen), Cu(NO3)2-clay (claycop), NH2OH-clay, PhI(OAc)2-alumina, NaIO4-silica, MnO2-silica, and NaBH4-clay. A variety of deprotection, condensation, cyclization, oxidation, and reduction reactions are presented including the efficient one-pot assembly of heterocyclic molecules from

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10

Begari, Eeshwaraiah, Chandani Singh, U. Nookaraju, and Pradeep Kumar. "Clay-Supported Copper Nitrate (Claycop): A Mild Reagent for the Selective Nitration of Aromatic Olefins." Synlett 25, no. 14 (2014): 1997–2000. http://dx.doi.org/10.1055/s-0034-1378513.

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11

Varma, Rajender S., and Rajender Dahiya. "Copper(II) nitrate on clay (claycop)-hydrogen peroxide: Selective and solvent-free oxidations using microwaves." Tetrahedron Letters 39, no. 11 (1998): 1307–8. http://dx.doi.org/10.1016/s0040-4039(97)10763-8.

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12

Begari, Eeshwaraiah, Chandani Singh, U. Nookaraju, and Pradeep Kumar. "ChemInform Abstract: Clay-Supported Copper Nitrate (Claycop): A Mild Reagent for the Selective Nitration of Aromatic Olefins." ChemInform 46, no. 9 (2015): no. http://dx.doi.org/10.1002/chin.201509078.

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13

VARMA, R. S., and R. DAHIYA. "ChemInform Abstract: Copper(II) Nitrate on Clay (Claycop)-Hydrogen Peroxide: Selective and Solvent-Free Oxidations Using Microwaves." ChemInform 29, no. 22 (2010): no. http://dx.doi.org/10.1002/chin.199822044.

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14

Eschliman, Kayla, and Stefan Bossmann. "Synthesis of Isothiocyanates: An Update." Synthesis 51, no. 08 (2019): 1746–52. http://dx.doi.org/10.1055/s-0037-1612303.

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Isothiocyanates (ICTs) are a group of molecules that can be used for many different purposes, they exhibit anticancer, antimicrobial, antibiotic, and anti-inflammatory properties. The synthesis of isothiocyanates has been a focus of many researchers for nearly the past 100 years. One of the most common synthetic methods is to form a dithiocarbamate salt, either as the first step or in situ, and then treat the salt with a desulfurization agent to reach the isothiocyanate. There are many different desulfurization agents available. Among these, there are eleven in particular that will be discusse

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15

Elnagdy, Hanan M. F., Kongkona Gogoi, Abdul A. Ali, and Diganta Sarma. "Claycop/hydrazine: A new and highly efficient recyclable/reusable catalytic system for 1,4-disubstituted-1,2,3-triazole synthesis under solvent-free conditions." Applied Organometallic Chemistry 32, no. 1 (2017): e3931. http://dx.doi.org/10.1002/aoc.3931.

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16

Deguy, Michel. "Clayton." Po&sie N° 175-176, no. 1 (2021): 25–26. http://dx.doi.org/10.3917/poesi.175.0025.

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17

McLachlan, Athol. "Nachruf Beadle, Leonard Clayton (1905-1985)." Archiv für Hydrobiologie 108, no. 4 (1987): 583–87. http://dx.doi.org/10.1127/archiv-hydrobiol/108/1987/583.

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18

Jacobs, Nathan. "CONTRA CLAYTON." Faith and Philosophy 25, no. 4 (2008): 376–93. http://dx.doi.org/10.5840/faithphil200825440.

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19

Green, Andrew. "Paula Clayton." Lancet 399, no. 10321 (2022): 232. http://dx.doi.org/10.1016/s0140-6736(22)00022-8.

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20

Mack, Timothy C. "Audrey Clayton." World Futures Review 6, no. 2 (2014): 208–9. http://dx.doi.org/10.1177/1946756714537791.

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21

VanderStaay, Steven L. "Believing Clayboy." Qualitative Inquiry 9, no. 3 (2003): 374–94. http://dx.doi.org/10.1177/1077800403009003004.

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22

Orth, Donald J. "Claytor Lake." Fisheries 43, no. 3 (2018): 168. http://dx.doi.org/10.1002/fsh.10057.

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23

Young, Grahame. "Sham and illusory trusts—lessons from Clayton v Clayton." Trusts & Trustees 24, no. 2 (2017): 194–204. http://dx.doi.org/10.1093/tandt/ttx207.

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24

Nanthakumar, A. "A Comparison of Copulas Based on the Range Distribution and Its Application." International Journal of Statistics and Probability 13, no. 1 (2024): 55. http://dx.doi.org/10.5539/ijsp.v13n1p55.

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This paper compares some Archimedean Copulas based on the range distribution and its application. We show that the Clayton Copula is better than the other Copula models considered in this paper. Also, Clayton Copula performed better than the regular one-way ANOVA when there were no outliers. However, when the data had outliers, the Clayton Copula performed almost at the same level (power-wise) as the regular one-way ANOVA.  &nbsp;

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25

Rolnick, Philip. "Regarding Philip Clayton." Tradition and Discovery: The Polanyi Society Periodical 29, no. 3 (2002): 5–6. http://dx.doi.org/10.5840/traddisc2002/200329333.

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26

Gulick, Walter B. "Response to Clayton." Tradition and Discovery: The Polanyi Society Periodical 29, no. 3 (2002): 32–47. http://dx.doi.org/10.5840/traddisc2002/200329340.

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27

Rothaupt, Jeanne W., and Barb Flom. "Review ofMichael Clayton." Journal of Feminist Family Therapy 20, no. 3 (2008): 277–79. http://dx.doi.org/10.1080/08952830802274341.

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28

Morabia, Alfredo. "Janet Lane-Claypon." Epidemiology 18, no. 3 (2007): 413. http://dx.doi.org/10.1097/01.ede.0000259345.50090.27.

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29

Hoover, Robert M., Ira Dyer, and David T. Blackstock. "Clayton Hamilton Allen." Physics Today 58, no. 7 (2005): 76–77. http://dx.doi.org/10.1063/1.2012475.

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30

Buksa, Miklós, Janka Hoffmann, Bence Kiss-Dobronyi, and Balázs Thaler. "Clayton Christensen emlékére." Vezetéstudomány / Budapest Management Review 51, no. 3 (2020): 89–90. http://dx.doi.org/10.14267/veztud.2020.03.09.

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31

Charalampous, Kanellos. "Joseph Clayton Schoolar." Neuropsychopharmacology 39, no. 13 (2014): 3131. http://dx.doi.org/10.1038/npp.2014.251.

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32

Oransky, Ivan. "Clayton Samuel White." Lancet 363, no. 9424 (2004): 1913. http://dx.doi.org/10.1016/s0140-6736(04)16381-2.

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33

Richmond, Caroline. "Barbara Evelyn Clayton." Lancet 377, no. 9775 (2011): 1402. http://dx.doi.org/10.1016/s0140-6736(11)60564-3.

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34

Davies, P. "Dame Barbara Clayton." BMJ 342, mar29 2 (2011): d2004. http://dx.doi.org/10.1136/bmj.d2004.

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35

Schweitzer, Jeffrey S. "Colin Geoffrey Clayton." Applied Radiation and Isotopes 59, no. 5-6 (2003): 303. http://dx.doi.org/10.1016/j.apradiso.2003.08.008.

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36

Clayton, Nicola S. "Nicola S. Clayton." Current Biology 17, no. 10 (2007): R345—R346. http://dx.doi.org/10.1016/j.cub.2007.03.010.

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37

Andrews, Tony. "Saville Nicholas Clayton." Veterinary Record 192, no. 2 (2023): 89. http://dx.doi.org/10.1002/vetr.2675.

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38

Wentz, Margaret R. "Urchin Vessel by Deanna Clayton and Crosshatch by Keith Clayton." Mayo Clinic Proceedings 90, no. 2 (2015): e19. http://dx.doi.org/10.1016/j.mayocp.2014.10.018.

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39

Collis, Chuck. "Field Research and Conservation Class: Clayton High School, Clayton MO." UW National Parks Service Research Station Annual Reports 37 (January 1, 2014): 118–23. http://dx.doi.org/10.13001/uwnpsrc.2014.4063.

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Field Research & Conservation emphasizes long-term field research experiences, examines ecosystem processes, and investigates the evolution of American perspectives about nature. Our time spent at the UW-NPS research station is divided between pursuing behavioral ecology research and exploring Grand Teton National Park and the surrounding area. These experiences help students gain understanding of how the region was shaped by geological, biological, and political processes that have been influenced by Americaâs evolving conservation ethic. After the summer field experience, my students a

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40

Clayton, Alison, and Cameron McKenna. "Effective Recruitment and Selection." Legal Information Management 2, no. 2 (2002): 26–29. http://dx.doi.org/10.1017/s1472669600000098.

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Alison Clayton and Cath Hancock have supplied us with two articles addressing aspects of the recruitment and selection process. This article from Alison Clayton, Training and Development Officer at Cameron McKenna, deals with the skills you need to be an effective interviewer.

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41

Rao, Rojukurthi Sudhakar. "Banking Connects Trust and Anti-Trust: The English Clayton, American Clayton, French Refugee Turquandand British Native Bankers’ Wars in Banking-Cause Individual History." International Journal of Research Publication and Reviews 4, no. 5 (2023): 841–43. http://dx.doi.org/10.55248/gengpi.234.5.39675.

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42

Shaw, Robert B., and Joseph K. Wipff. "New combinations in Chondrosum (Poaceae)." Journal of the Botanical Research Institute of Texas 12, no. 1 (2018): 25. http://dx.doi.org/10.17348/jbrit.v12.i1.908.

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The following new combinations in Chondrosum are made: Chondrosum barbatum (Lag.) W. Clayton var. rothrockii (Vasey) R.B. Shaw & J.K. Wipff; Chondrosum ramosum (Scribn. ex Vasey) R.B. Shaw & J.K. Wipff; Chondrosum trifidum (Thurb.) Clayton var. burkii (Scribn. ex Watson) R.B. Shaw & J.K. Wipff.

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43

Tsai, Meng-Han, Daramola N. Cabral, Caitlyn Grunert, and Justin X. Moore. "Colorectal cancer survival disparities in the five regions of Georgia." PLOS ONE 19, no. 3 (2024): e0301027. http://dx.doi.org/10.1371/journal.pone.0301027.

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Background/objective The objective of this study was to examine 5-year colorectal cancer survival rates. We also determined whether demographics, tumor characteristics, and treatment modality were associated with 5-year CRC survival in the Clayton, West Central, East Central, Southeast, and Northeast Georgia regions because the significant higher CRC mortality rates in these regions in comparison to the overall rates in the State of Georgia. Methods We conducted a retrospective cohort analysis using data from the 1975–2016 Surveillance, Epidemiology, and End Results program aggregated CRC pati

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44

Nanthakumar, A. "Bivariate-Uniform Representations and Copula Approximations." International Journal of Statistics and Probability 14, no. 2 (2025): 21. https://doi.org/10.5539/ijsp.v14n2p21.

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In this paper, we present two different representations of the bivariate-uniform distribution and compare these to the Archimedean Copulas such as Clayton, Gumbel, and Frank. From this research, it is very clear that Gumbel Copula is a lot better than Frank and Clayton Copulas for approximating the Bivariate Uniform distribution. &nbsp;

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45

SUHARTO, AULIA ATIKA PRAWIBTA, KOMANG DHARMAWAN, and I. WAYAN SUMARJAYA. "ESTIMASI NILAI VaR PORTOFOLIO MENGGUNAKAN FUNGSI ARCHIMEDEAN COPULA." E-Jurnal Matematika 6, no. 1 (2017): 15. http://dx.doi.org/10.24843/mtk.2017.v06.i01.p143.

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Value at Risk explains the magnitude of the worst losses occurred in financial products investments with a certain level of confidence and time interval. The purpose of this study is to estimate the VaR of portfolio using Archimedean Copula family. The methods for calculating the VaR are as follows: (1) calculating the stock return; (2) calculating descriptive statistics of return; (3) checking for the nature of autocorrelation and heteroscedasticity effects on stock return data; (4) checking for the presence of extreme value by using Pareto tail; (5) estimating the parameters of Achimedean Co

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46

Howell, Louis H., and Lloyd N. Trefethen. "III‐posedness of absorbing boundary conditions for migration." GEOPHYSICS 53, no. 5 (1988): 593–603. http://dx.doi.org/10.1190/1.1442494.

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Absorbing boundary conditions for wave‐equation migration were introduced by Clayton and Engquist. We show that one of these boundary conditions, the B2 (second‐order) condition applied with the 45° (third‐order) migration equation, is ill‐posed. In fact, this boundary condition is subject to two distinct mechanisms of ill‐posedness: a Kreiss mode with finite speed at one boundary and another mode of a new kind involving wave propagation at unbounded speed back and forth between two boundaries. Unlike B2, the third‐order Clayton‐Engquist boundary condition B3 is well‐posed. However, we show th

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47

BELINDA, NADIRA SRI, KHAIRIL ANWAR NOTODIPUTRO, and AGUS MOHAMAD SOLEH. "BHF and copula models in small area estimation for household per capita expenditure in Bogor District." Jurnal Natural 24, no. 2 (2024): 61–72. http://dx.doi.org/10.24815/jn.v24i2.37278.

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Small area statistics are required when the sample size is small to produce estimates with adequate precision. The assumptions underlying Battese Harter Fuller (BHF) unit-level models may often be unrealistic in some applications. Copula is an alternative approach when the assumptions are violated. This research discusses the performance of BHF and Copula in small area estimation (SAE) for estimating household per capita expenditure in sub-district levels. This study presents household per capita expenditure, which has a skewed distribution. Due to the fact that the data contains outliers, an

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48

Ferani Suciana and Milda Yanuvianti. "Gambaran Kecemasan Perubahan Iklim pada Mahasiswa di Kota Bandung." Bandung Conference Series: Psychology Science 4, no. 1 (2024): 317–32. http://dx.doi.org/10.29313/bcsps.v4i1.10050.

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Abstract. Climate change is threatening human life and well-being. Human health affected by climate change is now a global concern. Bandung is one of the cities in Indonesia that is vulnerable to climate change. The emergence of the phenomenon of fear and concern is felt as an impact of climate change. This phenomenon is referred to as climate change anxiety (Clayton & Karazsia, 2020). This study aims to look at the description of anxiety about climate change among students in Bandung City. Climate anxiety is climate change anxiety as a negative response associated with concerns about clim

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49

Webb, Clayton, and Soren Jordan. "Avoiding, and Learning From, Mistakes Made by Junior Scholars Teaching Political Methodology." PS: Political Science & Politics 55, no. 1 (2021): 236–41. https://doi.org/10.5281/zenodo.5796613.

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This is the final version as it appears for the citation: Webb, Clayton and Soren Jordan. 2022. "Avoiding, and Learning From, Mistakes Made by Junior Scholars Teaching Political Methodology." <em>PS: Political Science & Politics</em> 55 (1): 236-241. DOI: 10.1017/S1049096521001189 The page numbers here are consistent with the published version. Corresponding author: Clayton Webb (webb767@ku.edu)

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50

Quealy-Gainer, Kate. "Blackout by Dhonielle Clayton." Bulletin of the Center for Children's Books 74, no. 10 (2021): 420–21. http://dx.doi.org/10.1353/bcc.2021.0289.

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