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Washington: Carnegie Institution of Washington, 1926
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Washington: Carnegie Institution of Washington, 1925
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Washington: Carnegie Institution of Washington, 1921
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Washington: Carnegie Institution of Washington, 1920
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Washington: Carnegie Inst., 1908
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Washington: Carnegie Institution of Washington, 1914
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Washington: Carnegie Inst., 1905
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Washington: Carnegie Institution of Washington, 1924
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Washington: Carnegie Institution of Washington, 1910
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Washington: Carnegie Inst., 1903
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Washington: Carnegie Institution of Washington, 1910
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Washington: Carnegie Institution of Washington, 1907
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Washington, DC, 1909 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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The Plant World Association, 1908
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University of Chicago Press, 1904
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The University of Chicago Press, 1904
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JSTOR, 1906
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American Geographical Society, 1906
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Oxford University Press (OUP), 1906
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JSTOR, 1903