Puyaoan, Catherine Ariza A.  <br/><br/>
A Comparative study on the antibacterial effect of crude oil and extract of betel nut (Areca catechu L.)  
Catherine Ariza A. Puyaoan 
 -  2006 
 - xv, 34 leaves   28 cm. 
<br/><br/> Thesis (BS Biology) -- Mariano Marcos State University-College of Arts & Sciences, Batac City  
<br/><br/>Bibliography: leaf 19