TY  - BOOK
T1  - Cost of underground coal mining in Illinois /
DA  - [1982]
CY  - Champaign, Ill. :
AU  - Bhagwat, Subhash.
VL  - 84
CN  - TN24.I3 I48 no.84
CN  - TN24.I3
PB  - Illinois State Geological Survey,
PP  - Champaign, Ill. :
PY  - [1982]
N1  - "November 1982."
N1  - Bibliography: p. 8.
ID  - 67968
KW  - Coal mines and mining
TI  - Cost of underground coal mining in Illinois /
ER  -