- Author: Bernd-Christian Otto (editor) Michael Stausberg (editor)
- Language: English
- Year: 2013
- Author: Otto A. Böhmer
- Language: German
- Year: 2020
- Author: Otto A. Böhmer
- Language: German
- Year: 2021
- Author: Rudolph Otto
- Language: English
- Year: 1932
- Author: edited by Martin Böse Michael Bohlander Andre Klip Otto Lagodny.
- Language: English
- Year: 2018
- Author: Charles Christopher Mierow Bishop of Freising Otto I Rahewin
- Language: English
- Year: 1966
- Author: Otto Klineberg
- Language: English
- Year: 1944
- Author: Otto Demus
- Language: English
- Year: 1955
- Author: Otto Boele
- Language: English
- Year: 2009