- Author: Claudia Schumm (auth.)
- Language: German-English
- Year: 2004
- Author: H G Merz (auth.)
- Language: German
- Year: 2010
- Author: Sylvia Leydecker (auth.)
- Language: German
- Year: 2008
- Author: Meerwein Rodeck Mahnke (auth.)
- Language: English
- Year: 2007
- Author: Studiendirektor i.R. Horst Kahlert Studienrat Michael Wild (auth.)
- Language: German
- Year: 1999