Tiwari, R.S. “Sporological Succession in Kota and Turra Seams, Singrauli Coalfield (M.P.), India”. Journal of Palaeosciences 18, no. 1-3 (December 31, 1969): 264–269. Accessed February 21, 2025. https://jpsonline.co.in/index.php/jop/article/view/844.