Portland cement: normal and high early strength 

 - Lusaka  Zambia Standards Institute (ZSI)  1972 
 - ii, 19p.: ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PORTLAND CEMENT--STANDARDS--ZAMBIA
<br/><br/><label>LC Class. No.: </label>ZSI(08)ZS