# Johann Jacob Speidel
**Wikidata**: [Q19214096](https://www.wikidata.org/wiki/Q19214096)  
**Source**: https://4ort.xyz/entity/johann-jacob-speidel


## References

1. Czech National Authority Database
2. CERL Thesaurus
3. CiNii Research
4. [Source](http://thesaurus.cerl.org/record/cnp01292170)