
- Author: David Aaron Maroof (auth.)
- Language: English
- Year: 2012

- Author: Jörg Nohl (auth.)
- Language: German
- Year: 1989

- Author: Nick Kanas (auth.)
- Language: English
- Year: 2014

- Author: Kathy Tuzinski (auth.) Michael Fetzer Kathy Tuzinski (eds.)
- Language: English
- Year: 2013

- Author: Peter Gabler (auth.)
- Language: German
- Year: 2003

- Author: Dr. Hans Rust (auth.)
- Language: German
- Year: 1924

- Author: Professor Dr. Rolf Steyer (auth.)
- Language: German
- Year: 2003