Ongkingco, Petronio Santos,  1933- <br/><br/>
Irrigation fee policies for the Upper Pampanga River Project, Philippines  [microform] / 
Petronio Santos Ongkingco 
 - Ann Arbor, Mich. :  University Microfilms International,  1977 
 - 1 microfilm reel :  positive ;  35 mm. 
<br/><br/>Thesis (Ph.D.) - University of Arizona, 1976 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Irrigation--Management--Philippines