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