@inbook{ERMS:SourceID:39711, author = {Gray, J. E.}, note = {CLEMAM P0647}, title = {Guide to the systematic distribution of Mollusca in the British Museum. Part I. [Gastropoda]. British Museum, London, xii + 230 pp. [9 May; Preface dated 10 Dec. 1856]}, url = {http://www.biodiversitylibrary.org/item/117528}, year = {1857} }