# Amber: its physical properties and geological occurrence

> Chicago: Field Museum of Natural History, 1923.

**Wikidata**: [Q51439431](https://www.wikidata.org/wiki/Q51439431)  
**Source**: https://4ort.xyz/entity/amber-its-physical-properties-and-geological-occurrence


## References

1. Biodiversity Heritage Library
2. Internet Archive
3. Source