TY - JOUR T1 - The Malayan species of Opisthostoma (Gastropoda, Probranchia, Cyclophoridae), with a catalogue of all the species hitherto described JF - The Bulletin of the Raffles Museum Y1 - 1952 A1 - van Benthem-Jutting, W.S.S. SP - 5 EP - 61 VL - 24 UR - http://rmbr.nus.edu.sg/rbz/biblio/24/24brm005-062.pdf ER - TY - JOUR T1 - Operculated land molluscs from Southeast Asia JF - Nature and life in Southeast Asia Y1 - 1965 A1 - Habe, T. SP - 111 EP - 128 PB - Japan Society for the Promotion of Science VL - 4 ER -