TY  - GEN
AU  - Heady, Earl O
AU  - Hexem, Roger W
TI  - Water production functions for irrigated agriculture
SN  - 0-8138-1785-4
U1  - 631.7 HEX 
CY  - Ames, Iowa state university press
KW  - Irrigated farming - economic aspects - mathematical models
ER  -