# Paul O. Erttmann
**Wikidata**: [Q94901599](https://www.wikidata.org/wiki/Q94901599)  
**Source**: https://4ort.xyz/entity/paul-o-erttmann


## References

1. Catalog of the German National Library
2. Literatur in Österreich 1938-1945, Band 6: Salzburg
3. Integrated Authority File