OPEN Univeristy of Sri Lanka <br/><br/>
Course of study leading to the degree of bachelor of science level 4 zoology PSU 

 - Nugegoda  the Open University of Sri Lanka  1987 
 - 149 p. 
<br/><br/><label>ISBN: </label>139334 
<br/><br/><label>Dewey Class. No.: </label>574  / OPE