00292nam a2200097Ia 450000500170000000800410001705000160005810000180007424500590009226000430015120251229182918.0251229s9999    xx            000 0 und d  aHD 1714 .R9  aRuttan, V .W. 4aThe economic demand for irrigated acreagecV .W Ruttan  aLondonb The Johns hopkins pressc1965