Safadi, Raed Research on irrigation & drainage technologies : Fifteen years of world bank experience / Raed Safadi & Herve Plusquellec - Washington : The World Bank , 1991 - 56p : ill. ; 30 cm. - World Bank Discussion paper No. 128 . ISBN: 0821318918 Subjects--Topical Terms: Research technologies Gov. Doc. Class. No.: UN WB DP-128