1
2
Published: Köln : Pahl-Rugenstein, 1970
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3
Book
4
5
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6
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9
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11
Published: Oer-Erkenschwick : Archiv der Arbeiterjugendbewegung, 1991
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12
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15
16
Published: Berlin : Dietz, 1983
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17
Published: Düsseldorf : Droste
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Published: Köln : Pahl-Rugenstein, 1977
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