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New York: Cavendish, 19XX-
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München: Blanckenstein, c 1987
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Augsburg: Natur-Verl., 1991
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New York [u.a.]: Facts on File Publ., 1986
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Cambridge University Press (CUP), 1988
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Cambridge University Press (CUP), 1986
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Cambridge University Press (CUP), 1986
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Cambridge University Press (CUP), 1981
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JSTOR, 1971
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JSTOR, 1968