Orozco, A.L. y Muñiz Barreto, L. 1993. Magnetic effects during the solar eclipse of July 11, 1991. Geofísica Internacional. 32, 1 (ene. 1993), 3–13. DOI:https://doi.org/10.22201/igeof.00167169p.1993.32.1.1147.