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Boston: Litte, Brown, 1937
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[Charlottesville, Va.]: Inst. for Research in the Social Sciences, Univ., 1930
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SAGE Publications, 1973
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JSTOR, 1965
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Informa UK Limited, 1963
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SAGE Publications, 1955
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University of Chicago Press, 1940
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The University of Chicago Press, 1940
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JSTOR, 1939
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JSTOR, 1938
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JSTOR, 1955
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JSTOR, 1938
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JSTOR, 1937
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JSTOR, 1937
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JSTOR, 1937
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JSTOR, 1947
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JSTOR, 1938
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JSTOR, 1939
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JSTOR, 1937
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SAGE Publications, 1938