# Karl-Johann Hartig

> Austrian engineer (born 1949)

**Wikidata**: [Q75295457](https://www.wikidata.org/wiki/Q75295457)  
**Source**: https://4ort.xyz/entity/karl-johann-hartig


## References

1. Vienna History Wiki
2. The Peerage
3. [Source](http://www.club-carriere.com/clubcarriere/index.php/branchen/fachbeitraege/userprofile/160234)
4. Virtual International Authority File