# Udo Sierck

> German author and activist

**Wikidata**: [Q95308624](https://www.wikidata.org/wiki/Q95308624)  
**Source**: https://4ort.xyz/entity/udo-sierck


## References

1. Catalog of the German National Library
2. Integrated Authority File
3. Virtual International Authority File
4. National Library of Israel Names and Subjects Authority File