- Author: John R. Clark
- Language: English
- Year: 1998
- Author: John Willis Clark
- Language: English
- Year: 2009
- Author: John D Clark
- Language: English
- Year: 1972
- Author: John F. Clark
- Language: English
- Year: 2002
- Author: Marsilio Ficino Carol V. Kaske John R. Clark
- Language: English
- Year: 1989
- Author: Marsilio Ficino Carol V. Kaske John R. Clark
- Language: English
- Year: 1989
- Author: John A. Clark Charles L. Prysby
- Language: English
- Year: 2004
- Author: John D. Clark
- Language: English
- Year: 2003