00355nam a2200121Ia 4500008004100000040001600041041001200057082001700069100002200086245008200108260002700190300001600217230917s9999||||xx |||||||||||||| ||und||  e98063aMAIN  aEnglish  a333.73 H339I  aHazlewood, Arthur 0aIrrigation economics in poor countries: illustrated by the usangu of Tanjania  aOxfordbPergamonc1962  avii, 144 p.