- Author: Hugh McLeave
- Language: English
- Author: Richard G Doty
- Language: English
- Year: 2004
- Author: Randy D. Smith
- Language: English
- Year: 2005
Except Education
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- Author: Chris Dahl
- Language: English
- Year: 2006
- Author: Donald Batchelor
- Language: English
- Year: 2001
- Author: John A. Maddux
- Language: English
- Year: 1997