- Author: C. Edwards David Penney David Calvis
- Language: English
- Year: 2020
- Author: Edwards Charles Henry, Penney David E
- Language: English
- Year: 2013
- Author: Edwards Charles Henry, Penney David E
- Language: English
- Year: 2013
- Author: Edwards Charles Henry, Penney David E
- Language: English
- Year: 2013
- Author: Edwards Charles Henry, Penney David E., Calvis David
- Language: English
- Year: 2008
- Author: Calvis David T, Edwards Charles Henry, Penney David E
- Language: English
- Year: 2018
- Author: Edwards Charles Henry, Penney David E., Calvis David
- Language: English
- Year: 2015
- Author: C. Henry Edwards David E. Penney David Calvis
- Language: English
- Year: 2017
- Author: Edwards Henry C., Penney David E.
- Language: English
- Year: 2014
- Author: C. Henry Edwards David E. Penney David T. Calvis
- Language: English
- Year: 2015