Bureau of Indian Standard <br/><br/>
IS : 269 1989  Ordinary portland cement 83 grade specification 

 - 4th 
 - New Delhi  Bureau of Indian Standard  1990 
 - 7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrical Engineering
<br/><br/><label>Dewey Class. No.: </label>624  / BU-I