PAL, S.; TERRELL, D. J.; HERRERO BERVERA, E. Radiometric determination of uranium, thorium and potassium in some rocks of the Guanajuato Mineral district, México. Geofísica Internacional, [S. l.], v. 14, n. 4, p. 329–335, 1974. DOI: 10.22201/igeof.00167169p.1974.14.4.967. Disponível em: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1528. Acesso em: 13 may. 2024.