00290nam a2200109Ia 450000500170000000800410001708200140005810000190007224500380009126000430012930000080017220260224040845.0260224s9999||||xx |||||||||||||| ||und||  a631.7 RED  aReddi, G. H.S. 0aEfficient use of irrigation water  aLudhiana : Kalyani Publications c2003  a492