Ratnapriya, S. <br/><br/>
Common diseases among the working population and associated productivity losses in seven selected industrial units in the district of Colombo 

 - Colombo  Ministry of Healthcare and Nutrition  2006 
 - xii, 55p. 
<br/><br/><label>ISBN: </label>9559093215 
<br/><br/><label>Universal Decimal Class. No.: </label>614.4  / R17