Hamden, Conn. : Shoe String Press, 1977
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Cambridge, Mass. : Harvard University Press, 1971
3d ed.

Berkeley, University of California Press 1973
2d ed., rev. and expanded.

University Park : Pennsylvania State University Press, 1963

New York, Appleton-Century-Crofts 1968

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London, Dawsons of Pall Mall, 1965

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