# Johann Daniel Friedrich Engel
**Wikidata**: [Q69017559](https://www.wikidata.org/wiki/Q69017559)  
**Source**: https://4ort.xyz/entity/johann-daniel-friedrich-engel


## References

1. Czech National Authority Database
2. Integrated Authority File
3. Catalog of the German National Library
4. Virtual International Authority File
5. Deutsche Biographie
6. CERL Thesaurus