00480nam a2200145Ia 4500008004100000020001800041100001900059245013100078250001100209260003700220300001700257500001400274650003000288700001600318120527s9999 xx 000 0 und d a9788183601849 aMichael, A. M. aPrinciples of agricultural enginering:bSurveying, Irrigation, Drainage Soil and Water Conservation. cA. M. Michael and Ojha. a6th ed bJain Brothers.aNew Delhi:c2016 a1123p.bills aVolume ll aAgricultural engineering. aOjha, T. M.