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New York: Praeger, 1964
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Washington, DC, 1936 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2007
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Washington, DC, 1941 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2008
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Washington, DC, 1937 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2007
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Washington, DC, 1942 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2008
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Washington, DC, 1940 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2008
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Washington, DC, 1939 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2008
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American Association for the Advancement of Science (AAAS), 1960
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American Association for the Advancement of Science, 1960
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American Psychological Association (APA), 1955
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Oxford University Press (OUP), 1940
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Oxford University Press (OUP), 1955
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JSTOR, 1940
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Oxford University Press (OUP), 1935
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JSTOR, 1956
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The Science Press, 1944