@article{NARMS:SourceID:40646, author = {Willan, R. C.}, journal = {American Malacological Bulletin}, note = {Stated date: June 1987}, issue = {2}, pages = {215-241}, title = {Phylogenetic systematics of the Notaspidea (Opistobranchia) with reappraisal of families and genera}, url = {https://www.biodiversitylibrary.org/page/45940378}, volume = {5}, year = {1987} }