[1]
Urrutia Fucugauchi, J. 1986. The earth’s magnetic field / R.T. Merrill, M.M. Elhinny. Geofísica Internacional. 17, 1 (jul. 1986), 471–474. DOI:https://doi.org/10.22201/igeof.00167169p.1978.17.1.978.