# Oligocene

> third and last series and epoch of the Paleogene system and period

**Wikidata**: [Q101873](https://www.wikidata.org/wiki/Q101873)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Oligocene)  
**Source**: https://4ort.xyz/entity/oligocene


## References

1. International Chronostratigraphic Chart 2013/01
2. Integrated Authority File
3. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=37362)
4. Nuovo soggettario
5. Freebase Data Dumps. 2013
6. YSO-Wikidata mapping project
7. BabelNet
8. Quora
9. National Library of Israel
10. KBpedia