TY  - BOOK
CN  - TN305 .M55
CN  - TN305
CY  - [Arlington, Va.?] :
DA  - 1986.
ID  - 115396
KW  - Mine gases
N1  - Shipping list no.: 87-21-P.
PB  - U.S. Dept. of Labor, Mine Safety and Health Administration, National Mine Health and Safety Academy,
PP  - [Arlington, Va.?] :
PY  - 1986.
T1  - Mine gases.
TI  - Mine gases.
VL  - no. 2
ER  -