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7
Published: Frankfurt [u.a.] : Campus-Verl, 1991
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Published: Münster : Unrast, 1997
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11
Published: Frankfurt/Main : Der Heimreiter-Verlag, [1958]
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12
13
Published: Hamburg : VSA-Verl, 1993.
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14
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18
Published: Bonn, 1995.
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20
Published: Münster : Westfälisches Dampfboot, 2002
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