- Author: Ronald L. Grimes
- Language: English
- Year: 2013
- Author: Ronald L. Grimes, Ute Husken, Udo Simon, Eric Venbrux
- Language: English
- Year: 2011
- Author: Ronald L. Grimes
- Language: English
- Year: 2013
- Author: Ronald L. Grimes Ute Husken Udo Simon Eric Venbrux
- Language: English
- Year: 2011
- Author: Ronald L. Grimes
- Language: English
- Year: 2010
- Author: Ronald L. Grimes Ute Husken Udo Simon Eric Venbrux
- Language: English
- Year: 2011
- Author: Ronald L. Grimes
- Language: English
- Year: 2013
- Author: Ronald L. Grimes
- Language: English
- Year: 2006
- Author: Ronald L. Grimes
- Language: English
- Year: 2000