1
Published: Frankfurt/Main : Frankfurter Societäts-Druckerei, 1924
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2
Published: Köln : Dumont Schauberg, 1928
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3
Published: Berlin : Vereinigung Internationaler Verlagsanstalten, 1927
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5
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7
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10
Published: [Berlin] : [Verlag für Sozialpolitik], [1915]
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12
Published: Stuttgart : Belser, 1938
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