Hebert, Paul V. Sensitivity of water distribution costs to design and service standa rds : a Philippine case study / Paul V. Hebert and Cesar Yniguez. - Washington, D.C. : United Nations, 1986. - 32 p. : ill. ; 28 cm. - Technical note; no.16 . Subjects--Topical Terms: Water --Distribution.------ Subjects--Geographic Terms: Phillipine -- Economic conditions.