TY  - BOOK
AU  - Henn, Raymond W.,
TI  - AUA guidelines for backfilling and contact grouting of tunnels ans shafts
SN  - 0727729837
U1  - 624.193 
PY  - 2003///
CY  - United States
PB  - Asce Press
KW  - Tunnels
KW  - localuoh
KW  - Túneles
ER  -