1.
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London ; New York : Cassell, 1911.
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2.
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3.
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London : Eugenics Society, [1928?] (Letchworth : Garden City Press, Ltd.)
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4.
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London : Poor-Law Publications, Ltd., 1924.
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5.
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New York ; London : M. Kennerley, 1911 (J.J. Little & Ives Co.)
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6.
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Chicago : Vive Publishing House, [1915] ©1915
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7.
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London : Kegan Paul, Trench, Trubner & Co., Ltd. ; New York : E.P. Dutton & Co., 1923.
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8.
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Marietta, Ohio : The S.A. Mullikin Co., 1913.
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9.
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[Place of publication not identified] : [publisher not identified], [1916?] Seattle, Wash. : Printed by Washington Printing Company, [1916?]
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10.
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New York, New York : Open Road Integrated Media, 2015. ©2015
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