# Fresh water sponges; a monograph

> Philadelphia, Academy of Natural Sciences, 1887.

**Wikidata**: [Q51397896](https://www.wikidata.org/wiki/Q51397896)  
**Source**: https://4ort.xyz/entity/fresh-water-sponges-a-monograph


## References

1. Biodiversity Heritage Library
2. [Source](https://www.biodiversitylibrary.org/page/12427746)
3. Internet Archive
4. Source