[Baton Rouge] : Louisiana State University Press, 1964
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New York, F. Ungar Pub. Co. 1964

Princeton, N.J. : Princeton University Press, 1986

New York : Holt, Rinehart and Winston, 1967
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Minneapolis : University of Minnesota Press, 1965

New York, McGraw-Hill 1973

Westport, Conn. : Greenwood Press, 1981