# Johannes Schröpfer
**Wikidata**: [Q91012830](https://www.wikidata.org/wiki/Q91012830)  
**Source**: https://4ort.xyz/entity/johannes-schr-pfer


## References

1. Czech National Authority Database
2. Integrated Authority File
3. Catalog of the German National Library
4. VIAF ID
5. Bibliography of the History of the Czech Lands
6. Virtual International Authority File
7. Dictionary of Czech librarians