00303nam a2200109Ia 4500008004100000082001300041100002800054245004100082260004200123300001000165650001800175140113s9999    xx            000 0 und d  a632.9 K3  a" Van der Plank, J. E."  aPlant diseases: Epidemic and control  b"New York : Academic Press Inc, 1963"  a349p.  aPlant disease