'Notes on Vertigo alpestris and Vertigo pusilla in Watsonian Yorkshire' by David J. Lindley, published April 2016 in The Naturalist vol. 141, issue 1091 pp. 27-38. Download article
Terrestrial and freshwater molluscs - Yorkshire Checklist
Marine molluscs - Yorkshire Checklist
The Conchological Society of Great Britain and Ireland - Founded in 1876 the Conchological Society of Great Britain and Ireland is one of the oldest existing societies devoted to the study of molluscs.