R. K. SINGH; K. N, SINGH; S. K. DHANORIA; A. BHATT; A. DIXTT. Petrochemistry and Depositional Environment of Permian Coals of Basundhara Block, Ib-Valley Coal field, Orissa, India. International Journal of Economic and Environmental Geology, [S. l.], v. 1, n. 2, p. 36–41, 2010. DOI: 10.46660/ijeeg.v1i2.615. Disponível em: http://econ-environ-geol.org/index.php/ojs/article/view/615. Acesso em: 27 oct. 2025.