# Blytt–Sernander system

> series of north European climatic periods

**Wikidata**: [Q886930](https://www.wikidata.org/wiki/Q886930)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Blytt–Sernander_system)  
**Source**: https://4ort.xyz/entity/blytt-sernander-system


## References

1. Freebase Data Dumps. 2013