00647nam a2200133Ia 4500008004100000040001700041082002200058100002000080245005600100260003200156300002100188500016700209650013700376190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta631.7bE80I  aEtcheverry, B A 0aIrrigation practice and engineeringcB A Etcheverry  aNew YorkbMcGraw-Hillc1915  av.2 (xviii,364p)  aContents: v.2 Conveyance of water: general considerations and features pertaining to irrigation systems;Convenyance of Water in canals, tunnekls, flumes and pipes  aIrrigation; Irrigated farming; Irrigation engineering; Irrigations pumps; Irrigation canals and flames; Irrigation water-Return flow