• Color image map : [ports of entry, United States-Mexican border] /

    Relief shown by spot heights. "Photoimagery rectified by optical scanning from color infrared aerial photograph taken ... by the Dirección General de Geografía del Territorio National (DGGTN), Mexico D.F., Mexico." "For sale by U.S. Geological Survey, Denver, Colorado 80225, or Reston, Virginia 22092 and by Centro de Centro de Asesoria y Venta de Información Estadística y Cartográfica Balderas #71, Mezzanine, Mexico 1, D.F." Each ...

    • Contributor: Geological Survey (U.S.)
    • Original Format: Maps
    • Date: 1979

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