00267nam a2200097Ia 4500008004100000082001200041100003400053245004400087260003000131300000800161140113s9999    xx            000 0 und d  a631  M6  a"Chopra, V.L. & Khoshoo,T.N."  aConservation for productive agriculture  a1986bI.C.A.R.cNew Delhi  a172