# Rolf Martens
**Wikidata**: [Q21368801](https://www.wikidata.org/wiki/Q21368801)  
**Source**: https://4ort.xyz/entity/rolf-martens-q21368801


## References

1. Catalog of the German National Library
2. Virtual International Authority File
3. [Source](https://kalliope-verbund.info/DE-611-BF-107131)