- Author: Robert Walker, Marilyn Howard
- Language: English
- Year: 2000
- Author: Robert Walker (editor), Michael Wiseman (editor)
- Language: English
- Year: 2003
- Author: Robert Walker (editor)
- Language: English
- Year: 1999
- Author: Carol E. Jordan, Michael T. Nietzel, Robert Walker, T. K. Logan
- Language: English
- Year: 2004
- Author: Paul Robert Walker
- Language: English
- Year: 2018
- Author: David Robert Walker, Louise C. Johnson, Tanja Luckins
- Language: English
- Year: 2022
- Author: Robert Walker
- Language: English
- Year: 2014
Spanish Influenza: The Story of the Epidemic That Swept America From the Newspaper Reports of 1918
epub
- Author: Ken Rossignol Robert Walker (editor)
- Language: English
- Year: 2020
- Author: Frederick Adolf Paola Robert Walker Lois LaCivita Nixon
- Language: English
- Year: 2009
- Author: Nathaniel Robert Walker
- Language: English
- Year: 2020