# Robert Walpen
**Wikidata**: [Q85839656](https://www.wikidata.org/wiki/Q85839656)  
**Source**: https://4ort.xyz/entity/robert-walpen


## References

1. archINFORM
2. Catalog of the German National Library
3. [Source](http://catalogo.pusc.it/auth/83369)
4. VcBA (identifier)
5. NUKAT
6. Catalogue of the Unione Romana Biblioteche Scientifiche
7. [archINFORM](https://www.archinform.net/service/wd_aiarch.php)
8. Virtual International Authority File