- Author: John M. Duggan Anne E. Duggan
- Language: English
- Year: 2005
- Author: John Duggan Henry Cord Meyer
- Language: English
- Year: 2001
- Author: Lisa Duggan Nan D. Hunter
- Language: English
- Year: 2006
- Author: Mary Kay Duggan
- Language: English
- Year: 1992
- Author: Katrin Eismann Sean Duggan Tim Grey
- Language: English
- Year: 2010
- Author: Chawla-Duggan
- Language: English
- Year: 1996
- Author: John Duggan Henry Cord Meyer
- Language: English
- Year: 2001
- Author: Richard Gott Sandra Duggan
- Language: English
- Year: 2003
- Author: Michael Duggan
- Language: English
- Year: 2009