# Pio Spezi
**Wikidata**: [Q94841639](https://www.wikidata.org/wiki/Q94841639)  
**Source**: https://4ort.xyz/entity/pio-spezi


## References

1. Catalog of the German National Library
2. [Source](https://books.google.it/books?id=bR2ySoOXdvoC&pg=PA91)
3. BnF authorities
4. Virtual International Authority File