- Author: Allan Seymour Walker
- Language: English
- Year: 1953
- Author: Janet Walker
- Language: English
- Year: 2009
- Author: John R. Walker Jack E. Miller
- Language: English
- Year: 2009
- Author: David J. Howe Mark Stammers Stephen James Walker
- Language: English
- Year: 1994
- Author: Glenn Walker Jack Shostak
- Language: English
- Year: 2010
- Author: Leon Chaitow, Judith Walker DeLany
- Language: Spanish
- Year: 2007
- Author: James S. Walker
- Language: English
- Year: 2008
- Author: Dag Stranneby William Walker
- Language: English
- Year: 2004
- Author: Margaret Y. Chu Diane Altwies Edward Walker
- Language: English
- Year: 2005
