- Author: Heinrich Holland Doris Holland (auth.)
- Language: German
- Year: 2014
- Author: Heinrich Holland Doris Holland (auth.)
- Language: German
- Year: 2006
- Author: Heinrich Holland Doris Holland (auth.)
- Language: German
- Year: 1989
- Author: Heinrich Holland Doris Holland (auth.)
- Language: German
- Year: 2008
- Author: Heinrich Holland Doris Holland (auth.)
- Language: German
- Year: 1996
- Author: Heinrich Holland Doris Holland (auth.)
- Language: German
- Year: 1993
- Author: Professor Dr. Heinrich Holland Doris Holland (auth.)
- Language: German
- Year: 2004
- Author: Professor Dr. Heinrich Holland Doris Holland (auth.)
- Language: German
- Year: 2001
- Author: Prof.Dr. Heinrich Holland Doris Holland (auth.)
- Language: German
- Year: 1999
- Author: Heinrich Holland Doris Holland (auth.)
- Language: German
- Year: 1998