# Robert C. R. Siekmann
**Wikidata**: [Q107197565](https://www.wikidata.org/wiki/Q107197565)  
**Source**: https://4ort.xyz/entity/robert-c-r-siekmann


## References

1. IdRef
2. Catalog of the German National Library
3. NUKAT
4. SHARE Catalogue
5. Virtual International Authority File
6. CiNii Research
7. CONOR.SI
8. [Source](http://catalogo.share-cat.unina.it/sharecat/searchNames?n_cluster_id=282225)