Field study / 
Maria Rita D. Lucas; Lourdes G. Dela Torre; Jerome A. Ouano; June P. Salana 
 - Manila :  Lorimar Publishing, Inc.,  2007. 
 - xiv, 201 p.:  ill.;  27.7cm. 
<br/><br/>Includes bibliography 
<br/><br/><label>ISBN: </label>9716856729 
<br/><br/><label>Dewey Class. No.: </label>Fil 370.7 L933 2007