00291nam a2200097Ia 4500008004100000082002200041245004700063260005100110300001000161650002200171140113s9999    xx            000 0 und d  a631.6.02(02) K4;1  aA manual on conservation of soil and water  b"New Delhi : Oxford & IBH publishing Co, 1964"  a208p.  aSoil conservation