original description
Müller, O. F. (1774). Vermium terrestrium et fluviatilium, seu animalium infusorium, Helminthicorum, et testaceorum, non marinorum, succincta historia. vol 2: I-XXXVI, 1-214, 10 unnumbered pages. Havniae et Lipsiae, apud Heineck et Faber, ex officina Molleriana., available online at https://www.biodiversitylibrary.org/page/12893715
page(s): 19 [details]
additional source
Rush, W. H. (1892). Extracts from a letter. <em>The Nautilus.</em> 6(7): 81-82., available online at https://www.biodiversitylibrary.org/page/42789033 [details]
additional source
van der Schalie, H. (1938). On the occurrence of <i>Helix lactea</i> Müller in North America. <em>The Nautilus.</em> 51(4): 132-134., available online at https://www.biodiversitylibrary.org/page/9203362 [details]
additional source
Hill, H. R. (1941). New records of introduced land shells in southern California. <em>The Nautilus.</em> 55(1): 31., available online at https://www.biodiversitylibrary.org/page/8519930 [details]
From editor or global species database