TY  - RPRT
TI  - Gamma-ray logs from central Bluegrass Region, Kentucky
AU  - Douglas F. B. Black
AU  - Earle Rupert Cressman
PY  - 1964
DO  - 10.3133/ofr6415
UR  - https://pubs.usgs.gov/publication/ofr6415
ID  - ofr6415
ER  -