00331nam a2200121Ia 4500008004100000082001700041100002100058245004400079250000900123260003200132650002600164650001900190220204s9999    xx            000 0 und d  a581.2bCHE;1  aCHESTER, K Starr 0aNature and prevention of plant diseases  aEd.2  aNew YorkbMcGraw Hillc1950  aPlant disease control  aPlant diseases