00439nam a2200181Ia 4500008004100000041001200041082001000053082001100063100001500074100001100089245004200100260001400142260003100156260000900187300001500196365002500211650002100236150901s9999    xx            000 0 und d  aEnglish  a632.9  bDEB/BI  aDebach P    eAuthor  aBiological control by natural enemies  aCambridge  bCambridge university press  c1974  a322  Pages  aUKP.8.5               aPlant Protection