00280nam a2200109Ia 4500008004100000082001700041100001600058245002900074260004200103300000900145650001600154140113s9999    xx            000 0 und d  a631.62.67 N9  a"Lenka, D."  aIrrigation and  Drainage  b"Ludhiana : Kalyani publishers, 1999"  a397p  aAgriculture