Roofing in developing countries: Research for new technology 
/ Special Advisory Committee 
 - Washington D C:   Special Advisory Committee,                    
 - 74p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language
<br/><br/><label>Subjects--Index Terms: </label>Industry 
<br/><br/><label>Universal Decimal Class. No.: </label>694.5  / L4