# Johannes Sigfridus

> scientist

**Wikidata**: [Q60845268](https://www.wikidata.org/wiki/Q60845268)  
**Source**: https://4ort.xyz/entity/johannes-sigfridus


## References

1. Czech National Authority Database
2. CERL Thesaurus
3. Catalog of the German National Library
4. LIBRIS
5. NUKAT
6. MAK
7. FactGrid