# Karl Hammer

> German historian

**Wikidata**: [Q54084814](https://www.wikidata.org/wiki/Q54084814)  
**Source**: https://4ort.xyz/entity/karl-hammer-q54084814


## References

1. Virtual International Authority File
2. CiNii Research
3. Integrated Authority File
4. [LIBRIS](http://libris.kb.se/hftwx2510895285)