- Author: Rainer Parthier
- Language: German
- Year: 2022
- Author: Kevin Donnelly
- Language: English
- Year: 2015
- Author: Paper David
- Language: English
- Year: 2018
- Author: Paper David
- Language: English
- Year: 2018
- Author: David Paper
- Language: English
- Year: 2018
- Author: Emerson M. Pugh George H. Winslow
- Language: English
- Year: 1966