Yapa, N. U. <br/><br/>
Micro  CDS/ ISIS  Simplified manual 

 - Natural Resources, Energy & science authority of Sri Lanka   Colombo 07  1994 
 - 100p. 
<br/><br/><label>Nat. Bib. No.: </label>5996 
<br/><br/><label>Universal Decimal Class. No.: </label>005.1  / YAP