000			005280000a22001690004500
245			_aManagement, operation and maintenance of irrigation and drainage systems
250			_a2nd ed.
700			_aJohnston, William R. ; Robertson, James B. eds.
260			_aNew York _bAmerican Society of Civil Engineers _c1991
300			_axiii, 432p.: ill.
440			_aASCE manual & reports on engineering ; no 57
020			_a0872627853
080			_a626.8 _bA5
650			_aIRRIGATION-DRAINAGE
041			_aEN
942			_cBK
999			_c32274 _d32274