by H.R. Blank ... [and others] ; report prepared by the U.S. Geological Survey in cooperation with the Deputy Ministry for Mineral Resources, Saudi Arabia
by Bruce D. Smith ... [and others] ; prepared for the Ministry of Petroleum and Mineral Resources, Deputy Ministry for Mineral Resources, Jiddah, kingdom of Saudi Arabia
by James C. Cole ... [and others] ; prepared for the Ministry of Petroleum and Mineral Resources, Deputy Ministry for Mineral Resources, Jiddah, Kingdom of Saudi Arabia
by Paul C. Thenhaus [and four others] ; prepared in cooperation with the Ministry of Petroleum and Mineral Resources, Deputy Ministry of Mineral Resources, Kingdom of Saudi Arabia