TY  - RPRT
TI  - Exploration of the Jefren gypsum-anhydrite deposit, Tripolitania, Libya
AU  - James Louis Gualtieri
PY  - 1962
DO  - 10.3133/ofr6257
UR  - https://pubs.usgs.gov/publication/ofr6257
ID  - ofr6257
ER  -