TY  - BOOK
T1  - Mineral production in Illinois in 1956 /
DA  - 1957.
CY  - Urbana, IL :
AU  - Busch, Willis L.
AU  - Voskuil, Walter H.
VL  - 238
CN  - QE105
CN  - QE105
PB  - Illinois State Geological Survey,
PP  - Urbana, IL :
PY  - 1957.
ID  - 20612
KW  - Mines and mineral resources
TI  - Mineral production in Illinois in 1956 /
ER  -