I.M.PREACHANDRA <br/><br/>
A Simplified Guide to Lotus 123 

 - Srilanka  University of Sri Jayewardene  pura       1988 
 - 189p. 
<br/><br/><label>ISBN: </label>955-9054-00-7 
<br/><br/><label>Dewey Class. No.: </label>5.7565