A methodology to evaluate the performance of irrigations systems application to Philippine national systems / [microform) : Carlos Garces Restrepo. - Ann Arbor, Mich. : University Microfilms International, 1984. - 4 microfiches ; 11 x 15 cm. Thesis (Ph.D.)-Cornell University, 1983. ISBN: Y910041117 Subjects--Topical Terms: Irrigation efficiency--Philippines.