# Hartmut Breitkreuz
**Wikidata**: [Q31150966](https://www.wikidata.org/wiki/Q31150966)  
**Source**: https://4ort.xyz/entity/hartmut-breitkreuz


## References

1. BnF authorities
2. general catalog of BnF
3. Virtual International Authority File
4. CiNii Research
5. IdRef