TY  - RPRT
TI  - Correlation of coal beds, coal zones, and key stratigraphic units in the Pennsylvanian rocks of eastern Kentucky
AU  - Charles L. Rice
AU  - J. Hiram Smith
PY  - 1980
DO  - 10.3133/mf1188
UR  - https://pubs.usgs.gov/publication/mf1188
ID  - mf1188
ER  -