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Boca Raton, Fla. [u.a.]: CRC Press, 1995
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New York [u.a.]: Elsevier, 1986
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New York: Facts on File, 1985
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New York [u.a.]: American Elsevier, 1976
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New York: Meredith Press, 1967
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New York: Duell, Sloan and Pearce, 1964
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New York: Duell, Sloan and Pearce, 1965
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Emerald, 1974
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JSTOR, 1935
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JSTOR, 1934
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JSTOR, 1932
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JSTOR, 1931
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JSTOR, 1930
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JSTOR, 1930
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JSTOR, 1929
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JSTOR, 1928
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Wiley, 1975
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JSTOR, 1939
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JSTOR, 1934
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JSTOR, 1933