Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
"Prepared in cooperation with the Divisão de Fomento da Produção Mineral, Departmento Nacional da Produção Mineral, Ministerio da Agricultura, Brasil under the auspices of the Interdepartmental Committee on Scientific and Culture Cooperation, Department of State."
Bibliography
Includes bibliographical references (pages 30-31) and index.