Oducayen, Maria Concepcion M.  <br/><br/>
Pollution monitoring in paoay lake using allium test 
Maria Concepcion M. Oducayen  
 -  2007 
 - xiv, 38 leaves   28 cm.  
<br/><br/> Thesis (BS Biology) -- Mariano Marcos State University-COllege of Arts and Sciences, Batac City  
<br/><br/>Bibliography: leaves 26-27