TY  - RPRT
TI  - Mineral reconnaissance of the Bir al Bayda' quadrangle, northwest Hijaz, Saudi Arabia
AU  - Robert Francis Johnson
AU  - Virgil A. Trent
PY  - 1968
DO  - 10.3133/ofr68149
UR  - https://pubs.usgs.gov/publication/ofr68149
ID  - ofr68149
ER  -