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Iowa City, Iowa: University, 1920
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Washington, DC, 1922 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2007
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Washington, DC, 1907 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Washington, DC, 1927 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2007
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Washington, DC, 1905 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Washington, DC, 1913 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2007
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American Association for the Advancement of Science (AAAS), 1938
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American Association for the Advancement of Science (AAAS), 1938
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Wiley, 1940
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The Brooklyn Botanic Garden, 1940
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American Association for the Advancement of Science (AAAS), 1942
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American Association for the Advancement of Science (AAAS), 1942
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Wiley, 1937
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The Science Press, 1942
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The Science Press, 1938
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Brooklyn Botanic Garden, 1937
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The Science Press, 1940
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American Association for the Advancement of Science (AAAS), 1943
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The Science Press, 1943
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American Association for the Advancement of Science (AAAS), 1930