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Published: London u.a. : Longman, 1991
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Published: New York, NY : St. Martin's Press, 1993
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Published: Kopenhagen : Actuel Service, 1958
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Published: Berlin : Humanistische Union, 2016
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Published: Bonn : Friedrich-Ebert-Stiftung, Abt. Arbeit und Sozialpolitik, 2001.
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