Bacnis, Leizel V.  <br/><br/>
Pesticide residue analysis in selected vegetable growing areas of Santa Catalina, Ilocos Sur 
Leizel V. Bacnis 
 -  2008 
 - xi, 40 leaves   28 cm. 
<br/><br/> Thesis (BS Environmental Science) -- Mariano Marcos State University-College of Arts and Sciences, Batac City  
<br/><br/>Bibliography: leaf 27