00473nam a2200157Ia 4500008004100000082001700041100001600058245006100074260004000135300000800175650004100183650003400224653001200258653002300270700002200293170901s1990    xx            000 0 und d  a632.96bG28A  aGerson, URI 0aAcarine Biocontrol AgentsbAn Illustrated Key and Manual  aLondonbChapman and Hall Ltd.c1990  a174  aAgriculture and related technologies  aTechnology (Applied sciences)  aAcarine  aBiological control  aSmiley, Robert L.