# Johannes Ackermann
**Wikidata**: [Q21415748](https://www.wikidata.org/wiki/Q21415748)  
**Source**: https://4ort.xyz/entity/johannes-ackermann


## References

1. Integrated Authority File
2. Catalog of the German National Library
3. Virtual International Authority File
4. [Source](http://saebi.isgv.de/gnd/121616614)