# Karl Ludwig Ring
**Wikidata**: [Q60840357](https://www.wikidata.org/wiki/Q60840357)  
**Source**: https://4ort.xyz/entity/karl-ludwig-ring


## References

1. CERL Thesaurus
2. Catalog of the German National Library
3. [Source](https://kalliope-verbund.info/DE-611-BF-7418)
4. [Source](http://thesaurus.cerl.org/record/cnp01091360)