@article {1485, title = {Revision der Familien und Gattungen der Pneumonopomen}, journal = {Malakozoologische Bl{\"a}tter}, volume = {23}, year = {1867}, pages = {77-86}, chapter = {77}, url = {http://www.biodiversitylibrary.org/page/15854492$\#$page/107/mode/1up}, author = {L. Pfeiffer} }