- Author: Christopher Duffy
- Language: English
- Year: 2015
- Author: Christopher Duffy
- Language: English
- Year: 1986
- Author: Christopher Duffy
- Language: English
- Year: 1964
- Author: Christopher Duffy
- Language: English
- Year: 2016
- Author: Christopher Duffy
- Language: English
- Year: 1981
- Author: Christopher Duffy
- Language: English
- Year: 1997
- Author: Christopher Duffy
- Language: English
- Year: 1985
- Author: Christopher Duffy
- Language: English
- Year: 2015
- Author: Christopher Duffy
- Language: English
- Year: 2015