TY  - BOOK
T1  - Methane accumulations in coal mine roof cavities /
DA  - 1978.
CY  - [Washington] :
AU  - Vinson, Robert P.
CN  - TN23
CN  - TN23
PB  - Dept. of the Interior, Bureau of Mines,
PP  - [Washington] :
PY  - 1978.
ID  - 10627
KW  - Methane
KW  - Coal mines and mining
KW  - Mine gases.
KW  - Mine explosions.
TI  - Methane accumulations in coal mine roof cavities /
ER  -