@misc{indiciaefba8a729b4c8, title = {Geology of the Precambrian rocks and rocks of the northern Harrat Hutaymah volcanic field, Baq'a quadrangle, sheet 27F, Kingdom of Saudi Arabia}, author = {Karl S. Kellogg and Saudi Arabia. Deputy Ministry for Mineral Resources and U.S. Geological Survey Saudi Arabia Mission}, year = {1984}, url = {https://pubs.usgs.gov/publication/70157935}, note = {Source identifier: 70157935} }