- Author: Jill J. Duffield
- Language: English
- Year: 2020
- Author: Denise Duffield-Thomas
- Language: English
- Year: 2019
- Author: Denise Duffield-Thomas
- Language: English
- Year: 2022
- Author: John S. Duffield, Peter J. Dombrowski
- Language: English
- Year: 2009
- Author: Guy E Duffield and Nathaniel M. Van Cleave
- Language: English
- Year: 1983
- Author: Mark Duffield
- Language: English
- Year: 2007
- Author: Denise Duffield-Thomas
- Language: English
- Year: 2018
- Author: Denise Duffield-Thomas
- Language: English
- Year: 2012
- Author: Edward Duffield Neill
- Language: English
- Year: 1883
- Author: Duffield Guy P
- Language: Spanish