- Author: David L. Walker
- Language: English
- Year: 2014
- Author: David W. Walker
- Language: English
- Year: 2015
- Author: David F. Walker
- Language: English
- Year: 2021
- Author: David Robert Walker, Louise C. Johnson, Tanja Luckins
- Language: English
- Year: 2022
- Author: David M. Walker
- Language: English
- Year: 2001
- Author: Richard L. Guerrant David H. Walker Peter F. Weller
- Language: English
- Year: 2011
- Author: David G. Walker
- Language: Spanish
- Author: David L. Walker
- Language: English
- Year: 1984
- Author: McMahon David M., Walker Sharon
- Language: English
- Year: 2008