TY  - BOOK
AU  - Indian Standards Institution
TI  - Specification for Hexagon Bolts for Steel Structures (IS : 6639 - 1972)
U1  - IS : 6639 - 1972 
PY  - 1973///
CY  - New Delhi
PB  - Indian Standards Institution
KW  - Indian Standard - IT
N1  - IS : 6639 - 1972
ER  -