TY  - RPRT
TI  - Revised correlation chart of coal beds, coal zones, and key stratigraphic units in the Pennsylvanian rocks of eastern Kentucky
AU  - Charles L. Rice
AU  - John K. Hiett
PY  - 1994
DO  - 10.3133/mf2275
UR  - https://pubs.usgs.gov/publication/mf2275
ID  - mf2275
ER  -