00326nam a2200109Ia 4500008004100000082002000041100004400061245004100105260003800146300001000184650002200194140113s9999    xx            000 0 und d  a632.9:577.21 N4  a" Marshall,  George and  Walters, Dale"  aMolecular biology in crop protection  b"London : Chapman and hall, 1994"  a283p.  aMolecular biology