- Author: Zöller-Engelhardt M.
- Language: German
- Year: 2014
- Author: Diane Engelhardt
- Language: English
- Year: 2022
- Author: Alexander Berthier [Louis-Alexandre Berthier] F. Engelhardt
- Language: German
- Year: 1801
- Author: Carol Engelhardt Herringer
- Language: English
- Year: 2008
- Author: F. B. Engelhardt
- Language: German
- Year: 1853
- Author: Elizabeth S. D. Engelhardt Lora E. Smith
- Language: English
- Year: 2019
- Author: Dietmar P. Berger, Rupert Engelhardt, Roland Mertelsmann
- Language: German
- Year: 2017
- Author: Robert Engelhardt
- Language: English
- Year: 2014
- Author: Tom Engelhardt
- Language: English
- Year: 2011