1.
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Boston ; New York : Houghton Mifflin Co., 1919.
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2.
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New Haven [Conn.] : Yale University Press, c2010.
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3.
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[Chicago] University of Chicago Press [1960]
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4.
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New York, Arno Press, 1974 [c1919]
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5.
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Cham, Switzerland : Birkhäuser, [2017]
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6.
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Chicago : University of Chicago Press, 1991.
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7.
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New York, Random House [c1939]
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