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Bonn: Ministerium, 1990-2005 / Nachgewiesen 1988(1990); 1991(1993); 6.1994(1996) - 9.2004(2005)
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1993
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Bielefeld: W. Bertelsmann Verlag, 2008
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Berlin, 2007
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Bielefeld: W. Bertelsmann Verlag, 2008
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Berlin, 2007
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2011
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2020
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wbv Publikation, 2011
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Springer Science and Business Media LLC, 2022
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Springer Science and Business Media LLC, 2010