Shukla, R. Rakesh, and S. Siddharth. 2001. “Petrological Basis for Rank (maturity) Determination of Permian Coals from Pathakhera Coal Belt, Satpura Basin, M. P., India”. Journal of Nepal Geological Society 23 (December):13–18. https://doi.org/10.3126/jngs.v23i0.31862.