TY - JOUR A1 - Willan, R. C. JO - American Malacological Bulletin N1 - Stated date: June 1987 IS - 2 SP - 215 EP - 241 C1 - 5 (2): 215-241 TI - Phylogenetic systematics of the Notaspidea (Opistobranchia) with reappraisal of families and genera UR - https://www.biodiversitylibrary.org/page/45940378 VL - 5 PY - 1987 Y2 - 2024-03-28 ER -