OPEN University of Sri Lanka <br/><br/>
Course of study leading to the degree of bachelor of science level 3-physcis PHU 

 - Nugegoda  The Open University of Sri Laka  0 
 - 211 p. 
<br/><br/><label>ISBN: </label>139492 
<br/><br/><label>Dewey Class. No.: </label>537  / OPE