TY  - BOOK
AU  - 
TI  - Coal Mine Ground Control
SN  - 0471041211
U1  - 622.8 PEN  
PY  - 1978///
CY  - New York
PB  - John Wiley & Sons
KW  - Ground Control ( Mining)
KW  - Coal Mines and Mining
KW  - Safety Measures
N1  - Includes bibliographical references and indexs ( p.: 443 - 450 )
ER  -