Tiwari R, Ram-Awatar. Sporae-dispersae and correlation of Gondwana sediments in Johilla coalfield, Son Valley Graben, Madhya Pradesh. JPS [Internet]. 1988 Dec. 31 [cited 2024 Dec. 4];37((1-3):94-114. Available from: https://jpsonline.co.in/index.php/jop/article/view/1604