TY  - BOOK
T1  - The Platteville and Galena groups in northern Illinois /
DA  - 1978.
CY  - Urbana :
AU  - Willman, H. B.
AU  - Kolata, Dennis R.,
CN  - QE662
CN  - QE105
CN  - QE660
CN  - QE662
PB  - Illinois State Geological Survey,
PP  - Urbana :
PY  - 1978.
ID  - 12020
KW  - Geology, Stratigraphic
KW  - Geology
TI  - The Platteville and Galena groups in northern Illinois /
ER  -