- Author: Sally M. Walker Roseann Feldmann
- Language: English
- Year: 2001
- Author: John M. Walker (Editor)
- Language: English
- Year: 2005
- Author: Bonnie L. Walker
- Language: English
- Year: 1996
- Author: Alan Walker
- Language: English
- Year: 2009
- Author: Martin Walker
- Language: German
- Year: 2010
- Author: Giuseppe Pantaleo Bruce D. Walker
- Language: English
- Year: 2001
- Author: Janet Walker
- Language: English
- Year: 2006
- Author: John H. Kroll Alan S. Walker
- Language: English
- Year: 1993
- Author: Keith Walker Nicholas Fisher
- Language: English
- Year: 2010
- Author: David H. Walker
- Language: English
- Year: 2008