TY - RPRT TI - Ground-followup studies of the 1977 airborne electromagnetic survey in the Assifar and Mulhal areas, Wadi Bidah district, Kingdom of Saudi Arabia AU - Vincent J. Flanigan AU - Hamdy Sadek PY - 1983 DO - 10.3133/ofr83367 UR - https://pubs.usgs.gov/publication/ofr83367 ID - ofr83367 ER -