Reston, Va. : The Survey ; Denver, Colo. : For sale by the Survey ; Mexico, D.F. : Centro de Asesoria y Venta de Información Estadística y Cartográfica, 1986-
Photoimagery rectified by optical scanning from color infrared aerial photographs taken December 12-15, 1979 and July 11, 22, 1982 by the Dirección General de Geografía del Territorio Nacional (DGGTN), Mexico D.F., Mexico.
Each sheet includes quadrangle location map and diagr. of adjoining color image maps.