Tiwari, R.S., and Ram-Awatar. “Sporae-Dispersae and Correlation of Gondwana Sediments in Johilla Coalfield, Son Valley Graben, Madhya Pradesh”. Journal of Palaeosciences 37, no. (1-3) (December 31, 1988): 94–114. Accessed May 10, 2024. https://www.jpsonline.co.in/index.php/jop/article/view/1604.