# Heinz Graef
**Wikidata**: [Q63836049](https://www.wikidata.org/wiki/Q63836049)  
**Source**: https://4ort.xyz/entity/heinz-graef


## References

1. Integrated Authority File
2. Czech National Authority Database
3. [Source](http://www.rppd-rlp.de/pk04336)
4. NUKAT
5. Répertoire International des Sources Musicales