Ram-Awatar. “Palynological Evidence for the Permian-Triassic Boundary in Sohagpur Coalfield, India”. Journal of Palaeosciences 46, no. (1-2) (December 31, 1997): 101–106. Accessed November 21, 2024. https://jpsonline.co.in/index.php/jop/article/view/1322.