TY - RPRT TI - Preliminary sulfur isotope investigations of mineral deposits in the Precambrian shield, Kingdom of Saudi Arabia AU - Ralph Jackson Roberts AU - Robert O. Rye AU - Mustafa M. Mawad PY - 1978 DO - 10.3133/ofr78776 UR - https://pubs.usgs.gov/publication/ofr78776 ID - ofr78776 ER -