# F. W. Up de Graff
**Wikidata**: [Q5853858](https://www.wikidata.org/wiki/Q5853858)  
**Source**: https://4ort.xyz/entity/f-w-up-de-graff


## References

1. [BnF authorities](https://catalogue.bnf.fr/ark:/12148/cb12488201m)
2. Catalog of the German National Library
3. general catalog of BnF
4. Virtual International Authority File
5. BnF authorities