OPEN University of Sri Lanka <br/><br/>
B.Sc.degree programme-BTU 2103, systematics of plants and animals 

 - Nugegoda  The Open University of Sri Lanka  0 
 - 127 p. 
<br/><br/><label>ISBN: </label>139216 
<br/><br/><label>Dewey Class. No.: </label>578.012  / OPE