- Author: Kremin-Buch Beate, Unger Fritz, Walz Hartmut
- Language: German
- Year: 2003
- Author: Kremin-Buch Beate, Unger Fritz, Walz Hartmut
- Language: German
- Year: 2008
- Author: Kremin-Buch Beate, Unger Fritz, Walz Hartmut
- Language: German
- Year: 2004
- Author: Kremin-Buch Beate, Unger Fritz, Walz Hartmut
- Language: German
- Year: 1999
Existenzgründung
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- Author: Kremin-Buch Beate, Unger Fritz, Walz Hartmut
- Language: German
- Year: 2005
- Author: Kremin-Buch Beate, Unger Fritz, Walz Hartmut, Häusler Eveline
- Language: German
- Year: 2005