Dutdut, Romelyn M.  <br/><br/>
Water pollution in the downstream part of Quiaoit river at Paoay, Ilocos Norte 
Romelyn M. Dutdut 
 -  2010 
 - viii, 58 leaves   28 cm.  
<br/><br/> Thesis (BS Environmental Science) -- Mariano Marcos State University-College of Agriculture, Food and Sustainable Development, Batac City 
<br/><br/>Bibliography: leaf 41