# Gerard Henricus Marie Claassens
**Wikidata**: [Q93237253](https://www.wikidata.org/wiki/Q93237253)  
**Source**: https://4ort.xyz/entity/gerard-henricus-marie-claassens


## References

1. Catalog of the German National Library
2. BnF authorities
3. Virtual International Authority File
4. Catalogue of the Library of the Pontifical University of the Holy Cross