Mexican national report on seismology and physics of the earth’s interior presented to the 14th general assembly of the International union of geodesy and geophysics, Zürich, Sept. 26-Oct. 7, 1967

Mexican national report on seismology and physics of the earth’s interior presented to the 14th general assembly of the International union of geodesy and geophysics, Zürich, Sept. 26-Oct. 7, 1967

Mexican national report on seismology and physics of the earth’s interior presented to the 14th general assembly of the International union of geodesy and geophysics, Zürich, Sept. 26-Oct. 7, 1967

Mexican national report on seismology and physics of the earth’s interior presented to the 14th general assembly of the International union of geodesy and geophysics, Zürich, Sept. 26-Oct. 7, 1967

Mexican national report on seismology and physics of the earth’s interior presented to the 14th general assembly of the International union of geodesy and geophysics, Zürich, Sept. 26-Oct. 7, 1967