"Bewässerungsfeldbau." . . "Agriculture." . . . . "Economische aspecten." . . "Irrigation." . . "IRRIGATION." . "Irrigazione - Aspetti economici." . . "Bewässerung." . . "Irrigation Economic aspects." . . "ECONOMIC ASPECTS." . . "Condicions econòmiques." . . "Landbouwtechniek." . . "Economia agrària." . . "Regatge Aspectes econòmics." . . "Wirtschaftlichkeit." . . "Riego." . . "Conreus de regadiu Aspectes econòmics." . . "Agricultura." . . "Clark, C." . . "Conreus de regadiu." . . "Irrigazione - Valutazione economica." . . "Irrigatie (waterhuishouding)" . . "Inovacoes Tecnicas Na Agricultura." . . "Irrigation Aspect économique." . . . . . . . . . . "The economics of irrigation 2d ed. completely rev. and enl" . . . . . "Definitions; Water requirements of plants; Economic returns irrigation; The costs of irrigation: general review, capital costs per hectare irrigated, pumping - primitive methods - power pumping; Water resources; Charges for water; Desalination." . . . . . . . "The economics : of irrigation" . "The Economics of irrigation" . "The Economics of irrigation"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Economics of Irrigation" . . . . . . . . . . . . . . . "The economics of irrigation" . "The economics of irrigation"@en . . . . "Economics of irrigation"@en . "Economics of irrigation" . . . . . . . . . . . . . . . . . . . . . . . . "The Economics of Irrigation" . . . . . . . . "The economics of irrigated agriculture; Water requirements of plants; Water resources and their exploitation; Groundwater economics; The cost of irrigation; Economic returns to irrigation; Charges for water; Planning irrigation development; Summary and conclusions." . . .