# Placidus Spies
**Wikidata**: [Q60844283](https://www.wikidata.org/wiki/Q60844283)  
**Source**: https://4ort.xyz/entity/placidus-spies


## References

1. Integrated Authority File
2. CERL Thesaurus
3. Catalog of the German National Library
4. [Source](http://thesaurus.cerl.org/record/cnp00642437)
5. Czech National Authority Database