OPEN University of Sri Lanka <br/><br/>
Course of study leading to the degree of bachelor of science-level 5, physics PS 

 - Nugegoda  The Unviersity of Sri Lanka  1988 
 - 91 p. 
<br/><br/><label>ISBN: </label>139528 
<br/><br/><label>Dewey Class. No.: </label>530.11  / OPE