00354nam a2200109Ia 450000500170000000800410001705000150005810000200007324500960009326000310018965000240022020251229192449.0251229s9999    xx            000 0 und d  aS 613 .B68  aBottrall, A. F. 0aComparative study of the management and organisation of irrigation projects.cA. F Bottrall  aUSAb The world bankc1981  aIrrigation Farming.