
- Author: Manfried Dietrich Oswald Loretz
- Language: German
- Year: 2013

- Author: Manfried Dietrich Oswald Loretz
- Language: German
- Year: 1998

- Author: Manfried Dietrich Ingo Kottsieper
- Language: German
- Year: 2016

- Author: Manfried Dietrich Oswald Loretz
- Language: German
- Year: 2003

- Author: Manfried Dietrich Oswald Loretz
- Language: German
- Year: 1997

- Author: Manfried Dietrich Oswald Loretz
- Language: German
- Year: 2003

- Author: Manfried Dietrich Oswald Loretz
- Language: German
- Year: 1996

- Author: Manfried Dietrich Oswald Loretz
- Language: German
- Year: 2002

- Author: Manfried Dietrich Oswald Loretz
- Language: German
- Year: 2007

- Author: Manfried Dietrich Oswald Loretz
- Language: German
- Year: 1999