Qidwai, H. A., & Casshyap, S. M. (1978). Grain Size Characteristics of Ancient Fluvial Deposits - An Example from Lower Gondwana (Permian) Formations Pench Valley Coalfield, Central India. Journal of Geological Society of India, 19(6), 240–250. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/64185