NAVALE, G.; SRIVASTAVA, S. A microscopic study of some Raniganj Coals. Journal of Palaeosciences, [S. l.], v. 19, n. 1-3, p. 263–269, 1970. DOI: 10.54991/jop.1970.875. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/875. Acesso em: 15 may. 2024.