TY  - RPRT
TI  - Reconnaissance geology of the Madha Quadrangle, sheet 18/43 A, Kingdom of Saudi Arabia
AU  - George Clarke Simmons
PY  - 1979
DO  - 10.3133/ofr80133
UR  - https://pubs.usgs.gov/publication/ofr80133
ID  - ofr80133
ER  -