TY  - BOOK
AU  - Bristol, Hubert M.
AU  - Buschbach, T. C.
CN  - TN872.I3
CN  - TN872.I3
CN  - QE660
CY  - Urbana :
DA  - 1973.
ID  - 17231
KW  - Geology, Stratigraphic
KW  - Petroleum
N1  - Cover title.
N1  - At head of title: State of Illinois. Department of Registration and Education.
PB  - Illinois State Geological Survey,
PP  - Urbana :
PY  - 1973.
T1  - Ordovician Galena Group (Trenton) of Illinois :structure and oil fields /
TI  - Ordovician Galena Group (Trenton) of Illinois :structure and oil fields /
ER  -