"Prepared in cooperation with the Secretaria de la Economia National, Direccion General de Minas y Petroleo and Universidad Nacional de Mexico, Instituto de Geologia under the auspices of Interdepartmental Committee on Cultural and Scientific Cooperation, Department of State."
Title from title screen (viewed July 10, 2014).
Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).