BHARADWAJ, D.; SINHA, V. Sporological succession and age of Jhingurdah seam, Singrauli coalfield, M.P., India. Journal of Palaeosciences, [S. l.], v. 17, n. (1-3), p. 275–287, 1968. DOI: 10.54991/jop.1968.803. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/803. Acesso em: 22 nov. 2024.