TY  - BOOK
T1  - Insoluble residues of the Sauk sequence (Cambrian and lower Ordovician) rocks of the Fairfield basin, Illinois :an aid in correlation and in petroleum exploration /
DA  - 1975.
CY  - Urbana :
AU  - Stevenson, D. L.
CN  - TN872.I3
CN  - TN872.I3
PB  - Illinois State Geological Survey,
PP  - Urbana :
PY  - 1975.
ID  - 5292
KW  - Petroleum
TI  - Insoluble residues of the Sauk sequence (Cambrian and lower Ordovician) rocks of the Fairfield basin, Illinois :an aid in correlation and in petroleum exploration /
ER  -