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Washington: United States Government Printing Office, 1930
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Washington: United States Government Printing Office, 1928
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Washington: United States Government Printing Office, 1929
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Washington, DC, 1897 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Washington, DC, 1899 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Washington, DC, 1894 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Washington, DC, 1896 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Smithsonian Institution, 1908
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Smithsonian Institution, 1905
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American Association for the Advancement of Science (AAAS), 1902
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American Association for the Advancement of Science (AAAS), 1902
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The MacMillan Company, 1902
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Smithsonian Institution, 1903
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Smithsonian Institution, 1903
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American Association for the Advancement of Science (AAAS), 1902
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American Association for the Advancement of Science (AAAS), 1902
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The MacMillan Company, 1902
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Smithsonian Institution, 1898
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Smithsonian Institution, 1898
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Smithsonian Institution, 1895