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Published: Wien : Czernin, 2003.
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Published: Köln : Volksblatt-Verl, 1993.
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Published: Bonn : Abt. Wirtschafts- und Sozialpolitik der Friedrich-Ebert-Stiftung, 2009.
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Published: Duisburg, 1991.
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Published: Hamburg, 1991.
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