TY  - BOOK
AU  - 
TI  - Tunnelling
SN  - 0900488344
U1  - 624.19 TUN 
PY  - 1976///
CY  - London
PB  - Institution of Mining and Metallurgy
KW  - Tunnelling
KW  - Congresses
N1  - Includes indexs ( p.: 445 - 455 )
ER  -