- Author: Doyle Steven, Crowder David A
- Language: English
- Year: 2010
- Author: Martin J. Crowder David J. Hand
- Language: English
- Year: 1990
- Author: Crowder David, Crowder Phillip
- Language: English
- Year: 2008
- Author: Phillip Crowder David A. Crowder
- Language: English
- Year: 2008
- Author: Phillip Crowder David A. Crowder
- Language: English
- Year: 2008
- Author: Phillip Crowder David A. Crowder
- Language: English
- Year: 2008
