- Author: Byron E. Shafer, Richard H. Spady
- Language: English
- Year: 2014
- Author: Byron E. Shafer
- Language: English
- Year: 1988
- Author: Byron E. Shafer, Richard Johnston
- Language: English
- Year: 2009
- Author: Byron E Shafer
- Language: English
- Year: 2016
- Author: Byron E. Shafer Elizabeth M. Sawyer
- Language: English
- Year: 2021
- Author: Byron E. Shafer Richard H. Spady
- Language: English
- Year: 2014
- Author: Byron E. Shafer
- Language: English
- Year: 1997
- Author: Byron E. Shafer Richard Johnston
- Language: English
- Year: 2009