- Author: Robert B. Howell
- Language: English
- Year: 1991
- Author: Bruce A. Weber Robert E. Howell
- Language: English
- Year: 2019
- Author: Paul A. Argenti Robert A. Howell and Karen A. Beck
- Language: English
- Year: 2005
- Author: Robert J. Howell
- Language: English
- Year: 2013
- Author: Robert C. Howell
- Language: English
- Year: 1992