Ramos, Jesus N.  <br/><br/>
Incidence of lead in Cerithiidae sp. in Gaang river (downstream) Currimao, Ilocos Norte  
Ramos, Jesus N. 
 -  2004 
 - xi, 27 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 17