editors, Helen L. Witmer, Ruth Kotinsky

U.M.I. (University Microfilms International) Out-of-Print Books on Demand 1990 printing

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by Helen L. Witmer ... [et al.]

Russell Sage Foundation 1963

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contributors, Barbara Biber ... [et al.] ; editors, Ruth Kotinsky, Helen L. Witmer

Harvard Univ. Press, for the Commonwealth Fund 1955

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edited by Helen Leland Witmer, Ruth Kotinsky

Harper [1952] [1st ed.]

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contributors, Frederick H. Allen ... [et al.] ; Helen Leland Witmer, editor

Harvard University Press 1946

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by Helen Leland Witmer

Commonwealth Fund 1940

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