por International Drip/trickle Irrigation Congress (3 : 1985 : Fresno, California) | American Society of Agricultural Engineers.
por Johnson, Howard P [editor] | Brakensiek, D. L, 1928- [editor] | Haan, Charles Thomas, 1941- [editor] | American Society of Agricultural Engineers.
por Irrigation and Drainage Specialty Conference (1971 : Lincoln, Nebraska) | American Society of Civil Engineers | American Society of Agricultural Engineers. Soil and Water Division | American Society of Civil Engineers. Irrigation and Drainage Division.
por Soil and Water Division American Society of Agricultural Engineers | Irrigacion and Drainage Division American Society of Civil Engineers.
por American Society of Agricultural Engineers.