00397nam a2200133Ia 4500008004100000082001500041100002000056245002200076260003400098300000900132490005100141600001900192650005200211140224s9999    xx            000 0 und d  a632:633 L4  aWheeler, B.E.J.  aDiseases in crops  aNew DelhibOxford & IBHc1976  a60p.  aInstitute of Biology Studies in Biology; no.64  aB.E.J. Wheeler  aPlants-diseases and pest resistance,Field crops