TY  - BOOK
AU  - Beer, Gernot
TI  - Technology Innovation in Underground Construction
SN  - 9780415551052
U1  - 624.19 GER 
PY  - 2010///
CY  - Leiden
PB  - CRC Press
KW  - Underground construction - Technological innovations
N1  - <p>Contents:</p>

<p>1. Introduction</p
ER  -