Perera Peter L. J. <br/><br/>
A Text Book Of Rural Science 

 - Colombo  W. E. Bastin & Co., 
 - ix, 284p. : ill , 21 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Universal Decimal Class. No.: </label>11  / N10