@article {1988, title = {Diagnoses of four undescribed Helicoids from Borneo and Guam (Ladrones)}, journal = {Proceedings of the Malacological Society of London}, volume = {12-13}, year = {1917}, chapter = {315-317}, url = {http://www.biodiversitylibrary.org/page/15770828$\#$page/367/mode/1up}, author = {G.K. Gude} }