
- Author: Marian B. Pour-El J. Ian Richards
- Language: English
- Year: 2017

- Author: Marian Boykan Pour-El J. Ian Richards
- Language: English
- Year: 1989

- Author: Marian B. Pour-El J. Ian Richards
- Language: English
- Year: 1989

- Author: Marian B. Pour-El J. Ian Richards
- Language: English
- Year: 1989