TY  - RPRT
TI  - Geology and fluorspar deposits, Big Four fault system, Crittenden County, Kentucky
AU  - George C. Hardin
AU  - Robert Denny Trace
PY  - 1959
DO  - 10.3133/b1042s
UR  - https://pubs.usgs.gov/publication/b1042S
ID  - b1042S
ER  -