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

 - Nugegoda  The Open University of Sri Lanka  1986 
 - 158 p. 
<br/><br/><label>ISBN: </label>139186 
<br/><br/><label>Dewey Class. No.: </label>581.5  / OPE