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Soft cover. Zustand: Good. 1st Edition. Original staple-bound green printed wraps 22x28cm. (2)pp prelims including covering letter from Glen Brown to Fadil Kabbani, Deputy Minister for Mineral Resources, 20pp report printed to the rectos only. Wraps good, foxed, lightly damp stained, with lower wrap coming away from staples. Interiors very good with ink offsetting to several of the blank versos (not affecting text). This report is a very early "preliminary" product of the monumental USGS-Aramco mapping project (1956-63), which, among other things, produced 21 Geological maps covering the whole of Saudi Arabia in a series of Quadrangles numbered I-200A to I-220A. It was prepared under the follow-up Saudi Arabian Mineral Exploration Project launched in 1963, which Brown coordinated from Jeddah. The team was made up of staff from USGS and the Directorate General for Mineral Resources, accompanied by a driller. Fieldwork was conducted in October 1966 at the ancient mines of En Nugger, Wadi Al Mushel, and Esh Sha'ib in eastern Asir (area covered by Map I-217A), to plan geophysical surveys and locate diamond drill holes. Local residents reported the existence of several other ancient mines close to En Nugger. It also recommended further research to the west of Abha. Very rare. Brown's covering letter states 20 copies were sent to Kabbani. Additional copies would have been circulated within USGS and probably Aramco. Worldcat locates two at the South Dakota School of Mines & Technology, and Colorado School of Mines (OCLC 182522754). USGS reissued it in 1969 as Open-File Report 69-189 (USGS website).