1.
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Englewood Cliffs, N.J., Prentice-Hall, c1966.
PR6011.O58 Z64 1966 |
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2.
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Harmondsworth ; New York : Penguin, 1981, c1976.
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3.
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New York, N.Y., U.S.A. : Penguin Books, 1988, c1987.
PR6052.R246 M9 1988 |
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4.
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New York : Columbia University Press, 1988.
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5.
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New York, McGraw-Hill [1971]
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6.
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London, New York, Oxford University Press, 1973.
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7.
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Oxford [Oxfordshire] ; New York : Oxford University Press, 1983.
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8.
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New York, N.Y., U.S.A. : Viking, 1989, c1988.
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9.
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México : Fondo de Cultura Económica, 1988.
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