Sarate, Omprakash S. “Petrographic Analysis and Depositional Environment of Subsurface Coal Seams of Koyagudem Area, Godavari Valley Coalfield, Telangana, India”. Journal of Palaeosciences 64, no. (1-2) (December 31, 2015): 151–161. Accessed May 4, 2024. https://jpsonline.co.in/index.php/jop/article/view/110.