TY  - BOOK
AU  - Champman, David 
TI  - Introduction to Tunnel Construction/ 
SN  - 	978-1-4987-6624-1
U1  - Circ. 624.193 C449i 2018 Second edition
PY  - 2018///
CY  - Boca Raton, London
PB  - CRC Press
KW  - 1. Includes index
N1  - Tunnels-- Design and Construction
ER  -