Rosqueta, Jaennia G.  <br/><br/>
Water quality assessment of Pison river, Marcos, Ilocos Norte 
Rosqueta, Jaennia G 
 -  2006 
 - xiii, 47 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 33