00291nam a2200109Ia 4500008004100000082001300041100002200054245004900076260002600125300001000151650002000161140113s9999    xx            000 0 und d  a632.9 J9  a" Martin, Hubert"  aThe scientific principles of crop protection  b"Edward Arnold, 1959"  a359p.  aCrop protection