00314nam a2200109Ia 4500008004100000082002300041100002000064245004900084260003800133300001000171650002300181140113s9999    xx            000 0 und d  a632.937.12'51 K4;1  a" DeBach, Paul"  aBiological control of insect pests and weeds  b"London : Chapman and hall, 1964"  a844p.  aBiological control