Introduction to environmental science 
Joel E. Unday, Shirley O. Banzuela, Jill B. Dalisay, Mayette L. Aromin, Rodolfo G. Pingao 
 - 166 pages  ; illus. ; (np) ;  25 cm. 
<br/><br/><label>ISBN: </label>9789718212097 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--c2010.--Valenzuela City--Newsprint