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Washington, DC: Smithsonian Institution, 1955
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Washington, DC: Smithsonian Institution, 1948
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Washington: Smithsonian Institution, 1942
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Washington, DC: Smithsonian Institution, 1942
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Washington: Smithsonian Institution, 1934
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Washington, DC, 1926 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2007
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Smithsonian Institution, 1964
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Smithsonian Institution, 1956
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Smithsonian Institution, 1952
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JSTOR, 1945
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University of Notre Dame, 1945
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Smithsonian Institution, 1930
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Smithsonian Institution, 1931
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Smithsonian Institution, 1931
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Smithsonian Institution, 1926
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Springer Science and Business Media LLC, 2021