Bharadwaj, D.C., S.C.D. Sah, and R.S. Tiwari. “Sporological Analysis of Some Coal and Carbonaceous Shales from Barren Measure Stage (Lower Gondwana) of India”. Journal of Palaeosciences 13, no. (1-3) (December 31, 1964): 222–226. Accessed May 13, 2024. https://jpsonline.co.in/index.php/jop/article/view/698.