# Piotr Stefan Seifman
**Wikidata**: [Q61199338](https://www.wikidata.org/wiki/Q61199338)  
**Source**: https://4ort.xyz/entity/piotr-stefan-seifman


## References

1. Integrated Authority File
2. CERL Thesaurus
3. Catalog of the German National Library
4. Österreichisches Biographisches Lexikon 1815–1950
5. NUKAT
6. MAK