# E. W. Vierdag
**Wikidata**: [Q94511803](https://www.wikidata.org/wiki/Q94511803)  
**Source**: https://4ort.xyz/entity/e-w-vierdag


## References

1. Virtual International Authority File
2. Integrated Authority File
3. Faceted Application of Subject Terminology
4. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
5. VIAF ID
6. NUKAT
7. National Library of Israel Names and Subjects Authority File
8. Catalogo of the National Library of India