Godwin-Austen, H. H. “X On the Generic Position of Helix Distincta, Pfr., of Siam”. Records of the Zoological Survey of India 16, no. 2 (June 30, 1919): 199–202. Accessed September 28, 2024. https://recordsofzsi.com/index.php/zsoi/article/view/162808.