Bharadwaj D, Srivastava S. Sporological Correlation of coal Seams in some blocks of Sohagpur Coalfield, M.P. India. JPS [Internet]. 1970 Dec. 31 [cited 2024 Nov. 4];19(1-3):1-28. Available from: https://jpsonline.co.in/index.php/jop/article/view/851