- Author: R. A. Humphreys
- Language: English
- Year: 1969
- Author: R. A. Humphreys
- Language: English
- Year: 1952
- Author: R. Stephen Humphreys
- Language: English
- Year: 2008
- Author: James E. Humphreys
- Language: English
- Year: 1975
- Author: Robert Arthur Humphreys
- Language: English
- Year: 1961
- Author: S.C. Humphreys
- Language: English
- Author: Paul Humphreys
- Language: English
- Year: 2014
- Author: R. Stephen Humphreys
- Language: English
- Year: 2020
- Author: Leonard A. Humphreys
- Language: English
- Year: 1995