@article{ERMS:SourceID:39691, author = {Gray, J. E.}, journal = {London Medical Repository}, note = {CLEMAM P0627
Published 1 March 1821}, issue = {87}, pages = {229-239}, title = {A natural arrangement of Mollusca, according to their internal structure.}, url = {https://archive.org/details/s0id11783780/page/229/mode/1up}, volume = {15}, year = {1821} }