Cruz,Liwayway M. <br/><br/>Ecology Liwayway M. Cruz  - Manila:  Booklore Publishing Corporation;  - 197 pages:  with Illustration;  22 cm. <br/><br/>Includes Index <br/><br/><label>ISBN: </label>9718170170 <br/><br/><label>LC Class. No.: </label>QH 541  / .C9573