Galdiano, Salome M.  <br/><br/>
Pollution monitoring in Quiaoit river, Batac, Ilocos Norte using allium test 
Salome M. Galdiano 
 -  2007 
 - xiv, 33 leaves   28 cm. 
<br/><br/> Thesis (BS Biology) -- Mariano Marcos State University-College of Arts and Sciences, Batac City  
<br/><br/>Bibliography: leaves 24-25