# Robert Gretzyngier
**Wikidata**: [Q105906366](https://www.wikidata.org/wiki/Q105906366)  
**Source**: https://4ort.xyz/entity/robert-gretzyngier


## References

1. Integrated Authority File
2. BnF authorities
3. Catalog of the German National Library
4. NUKAT
5. Virtual International Authority File
6. [MAK](http://mak.bn.org.pl/cgi-bin/KHW/makwww.exe?BM=1&NU=1&IM=4&WI=9810530142005606)
7. [Source](http://mak.bn.org.pl/cgi-bin/KHW/makwww.exe?BM=1&NU=1&IM=4&WI=9810530142005606)