Singh, R., and H. Singh. “Morphological Observations on Some Spores and Pollen Grains from the Palaeocene Subsurface Assemblages of Garo Hills, Meghalaya”. Journal of Palaeosciences, vol. 25, no. 1-3, Dec. 1976, pp. 475-80, doi:10.54991/jop.1976.1034.