@article{Porifera:SourceID:7776, author = {Laubenfels, M.W. de}, journal = {Proceedings of the United States National Museum}, issue = {29271-140}, pages = {(2927):1-140}, title = {The marine and fresh-water sponges of California}, url = {https://marinespecies.org/porifera/porifera.php?p=sourcedetails&id=7776}, volume = {81}, year = {1932} }