00379nam a22001457a 4500020001500000040000800015082001500023100001600038245003400054250000700088260004200095300000800137546001200145650007600157  a0521434025  addc  a632 MAN/PR  aJ G Manners  aPrinciples of Plant Pathology  aII  aUSAbCambridge University Pressc1993  a343  aEnglish  athe causes of plant diseasesaphysiology of host-parasite relationships