# William Karl Pfeiler
**Wikidata**: [Q95329941](https://www.wikidata.org/wiki/Q95329941)  
**Source**: https://4ort.xyz/entity/william-karl-pfeiler


## References

1. Catalog of the German National Library
2. Integrated Authority File
3. Virtual International Authority File
4. National Library of Israel Names and Subjects Authority File