TY  - BOOK
AU  - Indian Standards Institution
TI  - Safety Code for Tunneling Work (IS : 4756 - 1978)
U1  - IS : 4756 - 1978 
PY  - 1978///
CY  - New Delhi
PB  - Indian Standards Institution
KW  - Indian Standard - IT
N1  - IS : 4756 - 1978
ER  -