00318nam a2200121Ia 4500008004100000082002600041100002300067245002500090260003300115300001400148600001700162650001700179140224s9999    xx            000 0 und d  a582.282.112(082.2) L8  aSpencer, D.M., ed.  aThe powdery mildews.  aLondonbAcademic Pressc1978  axix,565p.  aD.M. Spencer  aMildew,Fungi