TY  - BOOK
T1  - Stack-unit mapping of geologic materials in Illinois to a depth of 15 meters /
DA  - 1988.
CY  - Champaign, Illinois :
AU  - Berg, Richard C.
AU  - Kempton, John P.
VL  - 542
CN  - QE105
CN  - QE105
PB  - Illinois State Geological Survey,
PP  - Champaign, Illinois :
PY  - 1988.
N1  - Four maps on folded sheets in pocket.
ID  - 125099
KW  - Geological mapping
TI  - Stack-unit mapping of geologic materials in Illinois to a depth of 15 meters /
ER  -