# Johannes Janssen

> German historian and politician (1829-1891)

**Wikidata**: [Q67635](https://www.wikidata.org/wiki/Q67635)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Johannes_Janssen)  
**Source**: https://4ort.xyz/entity/johannes-janssen


## References

1. Integrated Authority File
2. Great Soviet Encyclopedia (1969–1978)
3. Deutsche Biographie
4. [Index Theologicus](https://ixtheo.de/Authority/079554687)
5. BnF authorities
6. IdRef
7. International Standard Name Identifier
8. Virtual International Authority File
9. CERL Thesaurus
10. Catalogue of the Library of the Pontifical University of Saint Thomas Aquinas
11. CiNii Research
12. Encyclopædia Britannica Online
13. Library of Congress Authorities
14. Libraries Australia Authorities
15. Freebase Data Dumps. 2013
16. Bibliography of the History of the Czech Lands