TY  - BOOK
T1  - Practical design methods for barrier pillars
DA  - 1995.
CY  - [Washington, D.C.?] :
AU  - Koehler, J. R.
AU  - Tadolini, Stephen C.
VL  - 9427
CN  - I 28.27:
PB  - U.S. Dept. of the Interior, Bureau of Mines,
PP  - [Washington, D.C.?] :
PY  - 1995.
N1  - Distributed to depository libraries in microfiche.
N1  - Shipping list no.: 96-0161-M.
ID  - 195551
KW  - Pillaring (Mining)
KW  - Longwall mining
TI  - Practical design methods for barrier pillars
ER  -