00357nam a2200133Ia 4500008004100000082001500041100002400056245003700080260002600117300001000143600002100153600002100174650002800195140113s9999    xx            000 0 und d  a632.951 L1  a" Jacobson, Martin"  aNaturally occurring insecticides  b"Marcel Dekker, 1971"  a585p.  a" Crosby, D. G."  a" Crosby, D. G."  aBiological insecticides