TY  - RPRT
TI  - Reconnaissance geologic map of the Harrat Tuffil Quadrangle, sheet 20/39 B, Kingdom of Saudi Arabia
AU  - John S. Pallister
PY  - 1983
DO  - 10.3133/ofr83332
UR  - https://pubs.usgs.gov/publication/ofr83332
ID  - ofr83332
ER  -