000 004630000a22001810004500
020 _a0-8138-1785-4
060 _a100
082 _a333.913 HEX
100 _aHeady, Earl O
100 _aHexen, Roger W
245 _aWater production functions for irrigated agriculture
260 _aIowa, Iowa State University Press
260 _c1978
300 _a215
461 _a
650 _aIrrigated farming economic aspects mathematical models
942 _cBK
999 _c213862
_d213862