# Leonard Mróz

> Polish opera singer (1947-2020)

**Wikidata**: [Q64415902](https://www.wikidata.org/wiki/Q64415902)  
**Source**: https://4ort.xyz/entity/leonard-mr-z


## References

1. Integrated Authority File
2. BnF authorities
3. Czech National Authority Database
4. MusicBrainz
5. CiNii Research
6. Library of Congress Authorities
7. Virtual International Authority File