Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
"Prepared in cooperation with the Universidad Nacional de México, Instituto de Geología, Secretaría de la Economía Nacional Dirección General de Minas y Petróleo, and Comité Directivo para la investigación de los Recursos minerales de México under the auspices of Interdepartmental Committee on Scientific and Cultural Cooperation, Department of State."
Bibliography
Includes bibliographical references and index.
System Details
Master and use copy. Digital master created according to Technical Guidelines for Digitizing Archival Materials for Electronic Access. U.S. National Archives and Records Administration, 2004. http://www.archives.gov/preservation/technical/guidelines.html TxDN
Processing Action
digitized 2015 University of North Texas committed to preserve pda TXdn.010
Reproduction
Electronic reproduction. Denton, Texas : University of North Texas, 2015. Electronic reproduction from print master produced by University of North Texas.
