- Author: A. R. Trott T C Welch
- Language: English
- Year: 2000
- Author: Robert Bruce Thompson Barbara Fritchman Thompson
- Language: English
- Year: 2006
- Author: W F Stoecker
- Language: English
- Year: 1983
- Author: Sanks R.L.
- Language: English
- Year: 1998
- Author: Hubert Saint-Onge Charles Armstrong
- Language: English
- Year: 2004
- Author: Paul Rosenberg
- Language: English
- Year: 2004
- Author: Robert E. Quinn
- Language: English
- Year: 2004
- Author: George Pruitt John R. Hill
- Language: English
- Year: 2003
- Author: David W. Orr
- Language: English
- Year: 2002
