- Author: William von Hagen, Brian K. Jones
- Language: English
- Year: 2009
- Author: William von Hagen
- Language: english
- Year: 2006
- Author: Justin Davies Roger Whittaker William von Hagen
- Language: English
- Year: 2006
- Author: William von Hagen
- Language: English
- Year: 2008
- Author: William von Hagen
- Language: English
- Year: 2007
- Author: Kurt Wall William Von Hagen (auth.)
- Language: English
- Year: 2004
- Author: William Von Hagen
- Language: English
- Year: 2006
- Author: Justin Davies, Roger Whittaker, William Von Hagen
- Language: English
- Year: 2006
- Author: Justin Davies, Roger Whittaker, William Von Hagen
- Language: English
- Year: 2006
- Author: Brian Proffitt William Von Hagen
- Language: English
- Year: 2002