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Washington, DC, 1906 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Washington, DC, 1907 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Academy of Natural Sciences of Philadelphia, 1898
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JSTOR, 1947
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American Public Health Association, 1936
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JSTOR, 1923
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JSTOR, 1923
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Smithsonian Institution, 1907
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Smithsonian Institution, 1907
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Smithsonian Institution, 1906
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Smithsonian Institution, 1905
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Smithsonian Institution, 1905