TY  - RPRT
TI  - Geologic map of the south central Rub Al Khali quadrangle, Kingdom of Saudi Arabia
AU  - Leon F. Ramirez
AU  - E.L. Elberg
AU  - H.H. Helley
PY  - 1963
DO  - 10.3133/i219a
UR  - https://pubs.usgs.gov/publication/i219A
ID  - i219A
ER  -