# Wilhelm Greef
**Wikidata**: [Q60845441](https://www.wikidata.org/wiki/Q60845441)  
**Source**: https://4ort.xyz/entity/wilhelm-greef


## References

1. Integrated Authority File
2. CERL Thesaurus
3. Catalog of the German National Library
4. International Music Score Library Project
5. [Source](http://thesaurus.cerl.org/record/cnp01487730)