De Alwis L.Y.N. <br/><br/>
The national parks of Ceylon 

 -    1969 
 - 89p., ill.,  25*20 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Yala National Park <br/>Wilpattu National Park <br/>Gal-Oya National Park
<br/><br/><label>Universal Decimal Class. No.: </label>(x)502.72  / DER