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Published: Mannheim : Inst. für Landeskunde und Regionalforschung, 1995
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7
Published: Frankfurt am Main : Athenäum, 1974
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Published: Köln : Grote, 1969
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Published: Opladen : Leske u. Budrich, 1983
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Published: Essen : Klartext-Verl, 1994
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