# Rudolf Pfeffer
**Wikidata**: [Q60819860](https://www.wikidata.org/wiki/Q60819860)  
**Source**: https://4ort.xyz/entity/rudolf-pfeffer


## References

1. Integrated Authority File
2. Catalog of the German National Library
3. [Source](https://www.biographien.ac.at/oebl/oebl_P/Pfeffer_Rudolf_1864_1940.xml)
4. [Österreichisches Biographisches Lexikon 1815–1950](https://www.biographien.ac.at/oebl/oebl_P/Pfeffer_Rudolf_1864_1940.xml)