1
Published: Braunschweig : Georg-Eckert-Inst. für Internat. Schulbuchforschung, 1982
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2
Published: Berlin : Ed. ID-Archiv
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3
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4
Published: Berlin ; Leipzig, 1928
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5
Published: Warszaw : Polish Inst. of International Affairs [u.a.], 1965
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6
Published: Hamburg : Lütcke & Wulff, 1929
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7
Published: Tübingen : Mohr, 1924
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