TY  - RPRT
TI  - Reconnaissance geology of the Jabal 'Afaf Quadrangle, sheet 20/40 D, Kingdom of Saudi Arabia
AU  - Donald G. Hadley
AU  - Robert Joseph Fleck
PY  - 1979
DO  - 10.3133/ofr80129
UR  - https://pubs.usgs.gov/publication/ofr80129
ID  - ofr80129
ER  -