# Erdwin von der Hardt
**Wikidata**: [Q55904376](https://www.wikidata.org/wiki/Q55904376)  
**Source**: https://4ort.xyz/entity/erdwin-von-der-hardt


## References

1. Integrated Authority File
2. CERL Thesaurus
3. Faceted Application of Subject Terminology
4. [Source](http://thesaurus.cerl.org/record/cnp00551500)