- Author: Christian G. Fritz
- Language: English
- Year: 2008
- Author: Christian G. Fritz
- Language: English
- Year: 2023
- Author: Christian G. Fritz
- Language: English
- Year: 2008
- Author: Christian G. Fritz
- Language: English
- Year: 2009
- Author: Christian G. Fritz
- Language: English
- Year: 2009