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  1. Poetzsch, E.: Wirtschaftsinformation : Online - CD-ROM - Internet (2004) 9.36
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    Author
    Poetzsch, E.
  2. Poetzsch, E.: Wirtschaftsinformation : Online - CD-ROM - Internet (2001) 9.36
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    Author
    Poetzsch, E.
  3. Poetzsch, E.: Naturwissenschaftlich-technische Information : Online, CD-ROM, Internet (2005) 9.36
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    Poetzsch, E.