TY  - RPRT
TI  - Palynologic and petrographic intervals in the upper Pennsylvanian McLeansboro Group, Western Kentucky
AU  - J.C. Hower
AU  - C.T. Helfrich
AU  - D.A. Williams
PY  - 1994
DO  - 10.1016/0166-5162(94)90035-3
UR  - https://pubs.usgs.gov/publication/70017671
ID  - 70017671
ER  -