# Helperus Ritzema van Lier
**Wikidata**: [Q9287664](https://www.wikidata.org/wiki/Q9287664)  
**Source**: https://4ort.xyz/entity/helperus-ritzema-van-lier


## References

1. BnF authorities
2. general catalog of BnF
3. Virtual International Authority File
4. CERL Thesaurus
5. Faceted Application of Subject Terminology
6. Biografisch Portaal