# August Classen

> physician, ophthalmologist, philosopher (1835-1889)

**Wikidata**: [Q94912452](https://www.wikidata.org/wiki/Q94912452)  
**Source**: https://4ort.xyz/entity/august-classen


## References

1. Integrated Authority File
2. Catalog of the German National Library
3. Czech National Authority Database
4. Virtual International Authority File