# Helmut Klapper
**Wikidata**: [Q30066863](https://www.wikidata.org/wiki/Q30066863)  
**Source**: https://4ort.xyz/entity/helmut-klapper-q30066863


## References

1. Czech National Authority Database
2. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-3501-8425/employment/8439574)
3. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-3501-8425/employment/8439566)
4. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-3501-8425/employment/8439534)
5. Catalog of the German National Library
6. [Czech National Authority Database](https://aleph.nkp.cz/data/cnb.xml.gz)