Lastica, Ronald D.  <br/><br/>
Incidence of lead among bivalves in Gaang river (downstream) Currimao, Ilocos Norte 
Ronald D. Lastica  
 -  2004 
 - xv, 46 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 23