Robertson, Charles Alexander, 1931- <br/><br/>
Economic analysis of ground water irrigation in Neuva Ecija, Philippines  [microform] / 
Charles Alexander Robertson 
 - Ann Arbor, Mich. :  University Microfilms International,  1973 
 - 1 microfilm reel :  positif ;  35 mm. 
<br/><br/>Thesis (Ph.D.) - Cornell University, 1973 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Irrigation--Philippine Islands--Neuva Ecija<br/>Agriculture--Economic aspects--Philippine Islands