# Helmut Ostertag
**Wikidata**: [Q33303699](https://www.wikidata.org/wiki/Q33303699)  
**Source**: https://4ort.xyz/entity/helmut-ostertag


## References

1. Czech National Authority Database
2. [Source](https://www.hpk.uni-hamburg.de/resolve/id/cph_person_00000884)