Sah, S., and K. Jain. “Jurassic Spores and Pollen Grains from the Rajmahal Hills, Bihar, India: With a Discussion on the Age of the Rajmahal Intertrappean Beds”. Journal of Palaeosciences, vol. 13, no. (1-3), Dec. 1964, pp. 264-90, doi:10.54991/jop.1964.702.