Patent directory of Sri Lanka  Details of inventions patented by Sri Lanka from 1980 upto December 31, 1992 and the list of Sri Lanka's patents granted during year 1993 

 - Colombo  Sri Lanka inventors commission 
 - xxviii,105 p. 
<br/><br/><label>ISBN: </label>9559315005 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BOOKS BOX 395
<br/><br/><label>Dewey Class. No.: </label>B0395  / LDC