# John Hadlett Harker

> (born 1937)

**Wikidata**: [Q85410387](https://www.wikidata.org/wiki/Q85410387)  
**Source**: https://4ort.xyz/entity/john-hadlett-harker


## References

1. Czech National Authority Database
2. Virtual International Authority File
3. [Source](http://cantic.bnc.cat/registres/fitxa/114791)
4. LIBRIS
5. Autoritats UB
6. NUKAT
7. [Source](http://bnb.data.bl.uk/id/person/HarkerJH%28JohnHadlett%291937-)
8. National Library of Israel Names and Subjects Authority File
9. Catalogo of the National Library of India