Sarate OS. Coal petrographic characteristics and depositional conditions of the subsurface Barakar Formation (Early Permian) in Belampalli Coalfield, Godavari Valley, Telangana. JPS [Internet]. 2017 Dec. 31 [cited 2024 Nov. 21];66((1-2):71-80. Available from: https://jpsonline.co.in/index.php/jop/article/view/280