PÜTTMANN, W.; KALKREUTH, W. Comparison of hydrocarbon compositions in a sequence of humic coals, cannel coals and oil shales from the Pictou Coalfield, Nova Scotia. Atlantic Geoscience, [S. l.], v. 25, n. 1, 1989. DOI: 10.4138/1674. Disponível em: https://journals.lib.unb.ca/index.php/ag/article/view/1674. Acesso em: 5 may. 2024.