Ed: Herath, H.M.S.S.D. <br/><br/>
Occupational Health 

 -  Colombo:Ministry of Health  1990 
 - 1-154pgs 
 - Occupational Health 
<br/><br/><label>ISBN: </label>955-9093-00-2 
<br/><br/><label>Nat. Bib. No.: </label>003774 
<br/><br/><label>Dewey Class. No.: </label>613.6 O11