Dulloog, Marvin Aries I.  <br/><br/>
Evaluation of sanitation practices and hazardous wastes disposal of bus operators in laoag city  
Marvin Aries I. Dulloog 
 -  2007 
 - xiv, [53] leaves   28 cm. 
<br/><br/> Thesis (BS Environmental Science) -- Mariano Marcos State University-College of Arts and Sciences, Batac City 
<br/><br/>Bibliography: leaf 37