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Published: Bonn : Friedrich-Ebert-Stiftung, Abt. Wirtschafts- und Sozialpolitik, 2010.
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Published: Innsbruck ; Wien : Studien-Verl, 2001.
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Published: Zürich [u.a.] : Pendo, 2000.
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Published: Bonn : Dietz, 2001.
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