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Philadelphia [u.a.]: Saunders College Publishing, 1988
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Philadelphia [u.a.]: Saunders College Publ., 1995
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[Place of publication not identified]: OpenStax CNX, [2022]
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Washington, DC, 1897 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Washington, DC, 1903 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2006
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Portico, 2008
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Portico, 2008
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Cambridge University Press (CUP), 2005
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Portico, 2005
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Portico, 2005
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Portico, 2004
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Springer Science and Business Media LLC, 2004
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Portico, 2003
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Portico, 2003
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American Astronomical Society, 1990
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The American Association for the Advancement of Science, 1981
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American Association for the Advancement of Science (AAAS), 1981
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American Association for the Advancement of Science (AAAS), 1981
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The American Association for the Advancement of Science, 1980
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American Association for the Advancement of Science (AAAS), 1980