Search Results       Your search for [subject]Irrigation canals and flumes -- Philippines -- Design and construction returned 1 record.           Design guides and criteria for irrigation canals, O & M roads drainage channels & appurtenant structures. by Iglesia, Godofredo N.; Quezon City: National Irrigation Administration, 1979. Subject: Irrigation canals and flumes -- Philippines -- Design and construction; Irrigation farming -- Philippines.          Add to Book Cart Relevance: 39.55%