Sarate, O.S. “Biopetrological Study of Coals from Ramagundam Coalfield, Godavari Basin, Andhra Pradesh, India”. Journal of Palaeosciences 43, no. 1-3 (December 31, 1994): 122–138. Accessed May 10, 2024. https://www.jpsonline.co.in/index.php/jop/article/view/1195.