TY  - BOOK
T1  - Coal mining /
DA  - [1975]
CY  - [Washington] :
AU  - Zabetakis, Michael George,
CN  - TN295
CN  - TN295
PB  - U.S. Dept. of the Interior, Mining Enforcement and Safety Administration,
PP  - [Washington] :
PY  - [1975]
ID  - 6218
KW  - Coal mines and mining
TI  - Coal mining /
ER  -