Acio, Beya T.  <br/><br/>
Water quality assessment of Baldi river, Pasuquin, Ilocos Norte 
Beya T. Acio  
 -  2006 
 - xvii, 75 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: leaves 51-52