TY  - BOOK
T1  - Design practices for multiple-seam longwall mines
DA  - 1993.
CY  - Washington, D.C. :
AU  - Chekan, G. J.
AU  - Listak, Jeffrey M.
VL  - 9360
CN  - I 28.27:
CN  - TN295
CN  - TN288
PB  - U.S. Dept. of the Interior, Bureau of Mines,
PP  - Washington, D.C. :
PY  - 1993.
N1  - Distributed to depository libraries in microfiche.
N1  - Shipping list no.: 94-0272-M.
ID  - 195534
KW  - Ground control (Mining)
KW  - Longwall mining.
TI  - Design practices for multiple-seam longwall mines
ER  -