Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
"Prepared in cooperation with the Comite Directivo Para la investigacion de los Recursos Minerales de Mexico 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.
