# Karl Zwing
**Wikidata**: [Q131443482](https://www.wikidata.org/wiki/Q131443482)  
**Source**: https://4ort.xyz/entity/karl-zwing


## References

1. Catalog of the German National Library
2. NUKAT
3. Library of Congress Authorities
4. National Library of Israel Names and Subjects Authority File
5. Trove
6. Parsifal catalog