# Heinrich Petrus Hamer
**Wikidata**: [Q94861272](https://www.wikidata.org/wiki/Q94861272)  
**Source**: https://4ort.xyz/entity/heinrich-petrus-hamer


## References

1. Catalog of the German National Library
2. Integrated Authority File
3. [Source](https://kalliope-verbund.info/DE-611-BF-99633)