Banerjee, Manju. “Tropical Estuarine Angiosperm Vegetation in the Neogene Sediments of Bhutan, Eastern Himalaya, and Remarks on Palaeogeography of Siwalik Foreland Basins of Indian Subcontinent ”. Rheedea, vol. 6, no. 1, June 1996, pp. 127-40, https://doi.org/10.22244/rheedea.1996.06.01.11.