The shallow-water Haplosclerida (Porifera, Demospongiae) of the north east Atlantic Ocean: taxonomy, phylogeny and historical biogeography
de Weerdt, W.H. (1987). The shallow-water Haplosclerida (Porifera, Demospongiae) of the north east Atlantic Ocean: taxonomy, phylogeny and historical biogeography. PhD Thesis. Universiteit van Amsterdam: Amsterdam. 243 pp.