BHARADWAJ, D.; SRIVASTAVA, S. Sporological correlation of coal seams in Bisrampur coalfield, M.P., India. Journal of Palaeosciences, [S. l.], v. 18, n. 1-3, p. 87–94, 1969. DOI: 10.54991/jop.1969.822. Disponível em: https://www.jpsonline.co.in/index.php/jop/article/view/822. Acesso em: 12 may. 2024.