# Heinrich Erfle

> German optician and inventor (1884-1923)

**Wikidata**: [Q1597151](https://www.wikidata.org/wiki/Q1597151)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Heinrich_Erfle)  
**Source**: https://4ort.xyz/entity/heinrich-erfle


## References

1. Integrated Authority File
2. Mathematics Genealogy Project
3. International Standard Name Identifier
4. [Source](https://www.deutsche-biographie.de/sfz13514.html)
5. Freebase Data Dumps. 2013
6. Virtual International Authority File
7. National Library of Israel Names and Subjects Authority File