Guido, Ryan Manuel D. <br/><br/>
Fundamentals of environmental science/ 
Ryan Manuel D. Guido, Rizaldy E. Garcia, Julius L. Meneses, Alexander B. Quilang, and Noel D. Binag 
 - Mandaluyong City:  Books Atbp. Publishing Corp,  c2015. 
 - x, 179 pages :  illustrations ;  26 cm. 
<br/><br/>Includes bibliographical references.