TY  - BOOK
AU  - Bureau of Indian Standards
TI  - Ordinary Portland Cement, 33 Grade Specification (IS : 269 - 1989)
U1  - IS : 269 - 1989 
PY  - 1990///
CY  - New Delhi
PB  - Bureau of Indian Standards
KW  - Indian Standard - IT
N1  - IS : 269 - 1989
ER  -