- Author: Robert A. Strong
- Language: English
- Year: 2005
- Author: Robert Hale Strong Ashley Halsey
- Language: English
- Year: 2013
- Author: Robert A. Strong
- Language: English
- Year: 2019
- Author: Robert A. Strong
- Language: English
- Year: 2008
- Author: Ronald A. Bailey Herbert M. Clark James P. Ferris Sonja Krause Robert L. Strong
- Language: English
- Year: 2002
- Author: Ronald A. Bailey Herbert M. Clark James P. Ferris Sonja Krause Robert L. Strong
- Language: English
- Year: 2002