00282nam a2200109Ia 4500008004100000082002300041245002300064260003300087300001000120600002000130650002200150130903s9999    xx            000 0 und d  a631.459:631.61  L6  aSoil conservation.  aLondonbB.T.Batsfordcc 1971  a318p.  aHudson, Norman.  aSoil Conservation