- Author: Frank C. Keil
- Language: English
- Year: 1989
- Author: Frank C. Keil
- Language: English
- Author: Frank C. Keil
- Language: English
- Year: 1979
- Author: Frank C. Keil
- Language: English
- Year: 2022
- Author: Frank C. Keil
- Language: English
- Year: 2022
- Author: Frank C. Keil
- Language: English
- Year: 1979
- Author: Frank C. Keil
- Language: English
- Year: 2014
- Author: Frank C. Keil
- Language: English
- Year: 1992
- Author: Frank C. Keil Robert A. Wilson
- Language: English
- Year: 2000
- Author: Frank C. Keil Robert A. Wilson
- Language: English
- Year: 2000