Pascua, Jackie E.  <br/><br/>
Anthropogenic activities and water quality assessment in Davila falls, Pasuquin Ilocos Norte 
Jackie E. Pascua  
 -  2004  
 - xv, 70 leaves   28 cm.  
<br/><br/> Thesis (BS Environmental Science) -- Mariano Marcos State University-College of Agriculture, Food & Sustainable Development, Batac City   
<br/><br/>Bibliography: leaf 38