# International Standard Book Number

> unique numeric book identifier

**Wikidata**: [Q33057](https://www.wikidata.org/wiki/Q33057)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/ISBN)  
**Source**: https://4ort.xyz/entity/international-standard-book-number


## References

1. [Source](https://www.iso.org/maintenance_agencies.html)
2. [Source](https://blogs.bl.uk/digital-scholarship/2020/09/when-is-a-persistent-identifier-not-persistent-or-an-identifier.html)
3. Freebase Data Dumps. 2013
4. datos.bne.es
5. Art & Architecture Thesaurus
6. Faceted Application of Subject Terminology
7. General Finnish Ontology
8. YSO-Wikidata mapping project
9. BabelNet
10. Nationalencyklopedin
11. Recommendation X.660 (07/2011): Information technology – Procedures for the operation of object identifier registration authorities: General procedures and top arcs of the international object identifier tree
12. YSA - General Finnish Thesaurus
13. Golden
14. National Library of Israel
15. KBpedia
16. Wikibase TDKIV