Gates, G. E. “Indian Earthworms. I. The Genus <i>Pheretima< I>”;. Records of the Zoological Survey of India 39, no. 2 (June 30, 1937): 175–212. Accessed September 20, 2024. https://recordsofzsiojs.sscldl.in/index.php/zsoi/article/view/162298.