# G. A. C. de Graaf
**Wikidata**: [Q55992323](https://www.wikidata.org/wiki/Q55992323)  
**Source**: https://4ort.xyz/entity/g-a-c-de-graaf


## References

1. BnF authorities
2. datos.bne.es
3. Virtual International Authority File
4. IdRef
5. Faceted Application of Subject Terminology