Jamaican standard specification for standard hollow concrete blocks / 
Bureau of Standards. 
 - 30 pages :  illustrations ;  29 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Concrete blocks--Standards.<br/>Standards--Jamaica.<br/>Concrete blocks--Standards.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Jamaica.