# John S. Duffield
**Wikidata**: [Q112496753](https://www.wikidata.org/wiki/Q112496753)  
**Source**: https://4ort.xyz/entity/john-s-duffield


## References

1. Czech National Authority Database
2. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)