- Author: Lyle Estill, David W. Orr
- Language: English
- Year: 2013
- Author: Rebecca L. Young, John Adams, David W. Orr
- Language: English
- Year: 2018
- Author: David R. Orr & David Truesdale
- Language: English
- Year: 2011
- Author: David W. Orr
- Language: English
- Year: 2002
- Author: David W. Orr (auth.)
- Language: English
- Year: 2011
- Author: David W. Orr
- Language: English
- Year: 2010
- Author: David W. Orr
- Language: English
- Year: 2009
- Author: David W. Orr
- Language: English
- Author: David W. Orr
- Language: English
- Year: 2002