# volumetric number density

> count per volume

**Wikidata**: [Q176449](https://www.wikidata.org/wiki/Q176449)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Number_density)  
**Source**: https://4ort.xyz/entity/volumetric-number-density


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)