- Author: Rudolf Col
- Language: Czech
- Year: 1938
- Author: Rudolf Dvořák
- Language: Czech
- Year: 1906
- Author: Rudolf Knopf
- Language: Greek, Modern (1453-)
- Year: 2023
- Author: Rudolf Langthaler
- Language: German
- Year: 2016
- Author: Rudolf zur Lippe (Hrsg.), Frank Hahn (Hrsg.)
- Language: German
- Year: 2019
- Author: Rudolf Ruzicka
- Language: German
- Year: 2016
- Author: Rudolf zur Lippe
- Language: German
- Year: 2014
- Author: Rudolf zur Lippe
- Language: German
- Year: 2016
- Author: Rudolf Col
- Language: Czech
- Year: 1938