# Fred Spier

> Dutch historian

**Wikidata**: [Q4489208](https://www.wikidata.org/wiki/Q4489208)  
**Source**: https://4ort.xyz/entity/fred-spier


## References

1. datos.bne.es
2. Integrated Authority File
3. Virtual International Authority File
4. data.bibliotheken.nl
5. IdRef
6. BnF authorities
7. Czech National Authority Database
8. general catalog of BnF
9. Album Academicum
10. [Album Academicum](http://albumacademicum.uva.nl/id/id054245)
11. Catalogo of the National Library of India