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1.
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2.
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London : C. Bingley ; Hamden, Conn. : Linnet Books, c1976.
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3.
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Arlington, Va. : Information Resources Press, 1980.
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4.
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New York : Oxford University Press, 1999.
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5.
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London : Falmer Press, 1996, c1993.
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6.
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New Haven : Yale University Press, c1992.
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