Veerappan, N., and H. N. Achuthan. “Records of Two Cercariae, Heterophyes Sp. and Haplorchis Sp. from the Snail, <I>Melanoides tuberculata< I> (Muller) from Tamil Nadu”. Records of the Zoological Survey of India, vol. 91, no. 3-4, Nov. 1992, pp. 319-23, doi:10.26515/rzsi/v91/i3-4/1992/160911.