PAREEK, H. S. Petrology of Coal, Burnt Coal and <I>Para Lava</I> from Singrauli Coalfield, M. P. & U. P. Journal of Geological Society of India, [S. l.], v. 11, n. 4, p. 333–347, 1970. Disponível em: https://geosocindia.com/index.php/jgsi/article/view/61050. Acesso em: 20 sep. 2024.