Mukherjee, Bankim, and Arabinda Ghosh. “Studies on the Petrography and Microfloristic of Coals of Karharbari and Barakar Stage from Parts of North Karanpura Coalfield, Bihar”. Journal of Palaeosciences 21, no. (1-3) (December 31, 1972): 129–143. Accessed November 4, 2024. https://jpsonline.co.in/index.php/jop/article/view/1478.