Jacob, M.K. et al. 2012. Macro Invertebrate Fossil Fauna (Mollusca) from Quilon Limestone Formation, Kerala State: Characteristics and Stratigraphic Implications. Records of the Zoological Survey of India. 112, 4 (Dec. 2012), 19–29. DOI:https://doi.org/10.26515/rzsi/v112/i4/2012/122015.