TY  - BOOK
AU  - Richardson, Harold W.
AU  - Mayo, Robert S.
TI  - Practical tunnel driving
U1  - 622.26 RIC 
PY  - 1941///
CY  - New York
PB  - McGraw-Hill Book Company
KW  - Tunnel construction
KW  - Excavation techniques
KW  - Underground structures
N1  - Includes index
ER  -