- Author: Gregory A. Barton
- Language: English
- Author: Gregory A. Barton
- Language: English
- Year: 2014
- Author: Gregory A. Barton
- Language: English
- Year: 2018
- Author: Gregory A. Barton (auth.)
- Language: English
- Year: 2014
- Author: Gregory Allen Barton
- Language: English
- Year: 2002