- Author: David R. Harper
- Language: English
- Year: 2011
- Author: David C. Harper
- Language: English
- Year: 2013
- Author: David C. Harper
- Language: English
- Year: 2012
- Author: David C. Harper
- Language: English
- Year: 2011
- Author: Stephen T. Abedon Benjamin H. Burrowes Malcolm L. McConville David R. Harper
- Language: English
- Year: 2018
- Author: David C. Harper, Richard Giedroyc
- Language: English
- Year: 2016
- Author: David E. Harper
- Language: English
- Year: 2004
- Author: David E. Harper
- Language: English
- Year: 2005
- Author: David C.Harper
- Language: English
- Year: 2014
- Author: David C. Harper
- Language: English
- Year: 2010