SARATE, O. S.; BASAVA CHARY, M. Petrographic evaluation of the coal seams from Gundala area, Godavari Valley Coalfield, Andhra Pradesh, India. Journal of Palaeosciences, [S. l.], v. 59, n. (1-3), p. 81–90, 2010. DOI: 10.54991/jop.2010.191. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/191. Acesso em: 2 oct. 2024.