@inbook{NARMS:SourceID:7293, author = {Burton, M.}, title = {Spongia. Pp. 1-71. In: Fridriksson, A. & Tuxen, S.L.(Eds), The Zoology of Iceland.}, url = {https://vliz.be/vmdcdata/narms/narms.php?p=sourcedetails&id=7293}, year = {1959} }