1.
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2.
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3.
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New York, Oxford University Press, 1959.
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4.
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Amherst : University of Massachusetts Press, 1983.
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5.
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Norman, University of Oklahoma Press [1965]
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6.
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New York, Oxford University Press, c1963.
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7.
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Indianapolis, New York, The Bobbs-Merrill company [1945]
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8.
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Boston, Mass. : Twayne, c1982.
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9.
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New York, Oxford University Press, 1966.
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10.
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New York, Oxford University Press, 1971.
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