IS-269:1989-IS ordinary portland cement, 33 grand specification.
Bureau of Indian Standards.
IS-269:1989-IS ordinary portland cement, 33 grand specification. Bureau of Indian Standards. - New Delhi. BIS 1989 - 7p
IS-269:1989-IS ordinary portland cement, 33 grand specification. Bureau of Indian Standards. - New Delhi. BIS 1989 - 7p