00281nam a2200109Ia 4500008004100000082001500041100002300056245002300079260003600102300001000138650002300148140113s9999    xx            000 0 und d  a632.937 L1  a" Huffaker, C. B."  aBiological control  b"New york : Plenum press, 1971"  a511p.  aBiological control