# Paul F. Langer
**Wikidata**: [Q117378323](https://www.wikidata.org/wiki/Q117378323)  
**Source**: https://4ort.xyz/entity/paul-f-langer


## References

1. National Library of Israel Names and Subjects Authority File
2. Catalog of the German National Library
3. Virtual International Authority File
4. CiNii Research
5. Catalogo of the National Library of India