- Author: Graham L Patrick, John Spencer
- Language: English
- Year: 2009
- Author: Alan Dashwood Angela Ward John Spencer Christophe Hillion
- Language: English
- Year: 2001
- Author: John Bell Alan Dashwood Angela Ward John Spencer
- Language: English
- Year: 2004
- Author: John Spencer
- Language: English
- Year: 1992
- Author: John Bell Alan Dashwood Angela Ward John Spencer
- Language: English
- Year: 2005
- Author: Alan Dashwood Christophe Hillion John Spencer Angela Ward
- Language: English
- Year: 2002
- Author: John Spencer
- Language: English
- Year: 2008
- Author: John Spencer Adam Hook
- Language: English
- Year: 2006
- Author: John Spencer. Trimingham
- Language: English
- Year: 1973
