GUHA, S.; SINGH, K. N. Source rock potentiality of Ib-Valley Coals, Mahanadi Coalfields Limited, Orissa, India. Journal of Nepal Geological Society, [S. l.], v. 29, p. 35 –, 2004. DOI: 10.3126/jngs.v29i0.31713. Disponível em: https://nepjol.info/index.php/JNGS/article/view/31713. Acesso em: 17 aug. 2024.