Ventura, Deborah C., <br/><br/>
Water Treatment Among Water Districts in Rinconada, Camarines Sur / 
Ventura, Deborah C., 
 - San Miguel, Iriga City  University of Saint Anthony  2006 
 - 132 leaves :  figures, tables 
<br/><br/>Includes Bibliographical References 
<br/><br/><label>Dewey Class. No.: </label>553.7 MAED  / V55