
- Author: Polkinghorne John
- Language: Spanish, Castilian
- Year: 2013

- Author: Polkinghorne John
- Language: English
- Year: 2002

- Author: Polkinghorne John
- Language: English
- Year: 2002

- Author: Polkinghorne John Charlton
- Language: English
- Year: 2002

- Author: Polkinghorne John
- Language: English
- Year: 2011

- Author: Polkinghorne John C
- Language: English
- Year: 2002