00291nam a2200097Ia 4500008004100000082001300041245009300054260001700147300001000164650001900174140113s9999    xx            000 0 und d  a632.9 L3  a"Proceedings of the symposium on epidemiology, forcasting and control of plant diseases"  b"INSA, 1973"  a510p.  aPlant diseases