# Josef von Graßmann
**Wikidata**: [Q55834946](https://www.wikidata.org/wiki/Q55834946)  
**Source**: https://4ort.xyz/entity/josef-von-gra-mann


## References

1. Catalog of the German National Library
2. [Source](https://kalliope-verbund.info/DE-611-BF-110109)
3. Virtual International Authority File