- Author: Maureen Johnson, Douglas Johnson
- Language: English
- Year: 2008
- Author: Maureen Johnson, Douglas Johnson
- Language: English
- Year: 2007
- Author: James A. Johnson, Douglas E. Anderson, Caren C. Rossow
- Language: English
- Year: 2018
- Author: Johnson Douglas
- Language: English
- Year: 2017
- Author: Johnson Douglas Hamilton
- Language: English
- Year: 2016
- Author: Johnson Maureen, Johnson Douglas
- Language: English
- Year: 2010
- Author: Johnson Maureen, Johnson Douglas
- Language: English
- Year: 2006
- Author: Airriess Christopher A., Johnson Douglas L.
- Language: English
- Year: 2015
- Author: Johnson Maureen, Johnson Douglas
- Language: English
- Year: 2009
- Author: Johnson Douglas, Johnson Maureen
- Language: English
- Year: 2011