Survey of Construction Industries 2011 :  English 
Department of Census & Statistic  
 - Colombo :  Department of Census & Statistic ,  2012 
 - viii, 25 p.:  21cm 
<br/><br/><label>ISBN: </label>9789555778206 
<br/><br/><label>Dewey Class. No.: </label>X31:693:338.924  / DEP