@inbook{Porifera:SourceID:7594, author = {Hartman, W.D.}, journal = {Sedimenta, 8. (Rosenstiel School of Marine and Atmospheric Science: Miami)}, pages = {1-274}, title = {Systematics of the Porifera. Pp. 24-51. In: Hartman,W.D.,Wendt, J.W. & Wiedenmayer, F. (Eds), Living and Fossil Sponges, Notes for a Short Course}, url = {https://www.marinespecies.org/porifera/porifera.php?p=sourcedetails&id=7594}, year = {1980} }