TY  - GEN
AU  - Maidl, Bernhard...[et.al]
TI  - Hardrock tunnel boring machines
SN  - 9783433016763
PY  - 2008///
CY  - Berlin
PB  - Ernst and sohn
KW  - Tunnelling machinery
KW  - Buring operation
KW  - Tunnel lining
ER  -