TY - RPRT TI - Reconnaissance geochemical exploration for gold in the Ad Darb area, Kingdom of Saudi Arabia AU - R.M. Samater AU - R.P. Christian AU - P.R. Johnson AU - A. A. Bookstrom PY - 1990 DO - 10.3133/ofr90285 UR - https://pubs.usgs.gov/publication/ofr90285 ID - ofr90285 ER -