# Johann Sperber
**Wikidata**: [Q21415744](https://www.wikidata.org/wiki/Q21415744)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Johann_Sperber)  
**Source**: https://4ort.xyz/entity/johann-sperber


## References

1. Catalog of the German National Library
2. [Source](http://saebi.isgv.de/gnd/139869972)
3. CERL Thesaurus