00289nam a2200109Ia 450000500170000000800410001708200140005810000160007224500490008826000340013730000080017120260224041033.0260224s9999||||xx |||||||||||||| ||und||  a632.9 MAR  aMartin, H.  4aThe scientific principles of crop protection  aLondon: Edward Arnold, c1983  a486