Title from title screen (viewed September 15, 2014).
Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
"Prepared in cooperation with the Liberian Geological Survey, Ministry of Lands and Mines, under the auspices of the Government of Liberia and the Agency for International Development, U.S. Department of State."
Bibliography
Includes bibliographical references (pages 49-50).