# Charles Holtzapffel

> Holtzapffel, Charles (1806–1847), mechanical engineer and technical writer

**Wikidata**: [Q18526796](https://www.wikidata.org/wiki/Q18526796)  
**Source**: https://4ort.xyz/entity/charles-holtzapffel


## References

1. Catalog of the German National Library
2. Oxford Dictionary of National Biography
3. Integrated Authority File
4. CERL Thesaurus
5. National Library of Israel Names and Subjects Authority File