00318nam a2200121Ia 4500008004100000082001500041100002500056245002800081250001200109260004700121300001000168650001800178140113s9999    xx            000 0 und d  a632:633 J6  a" Dickson, James G."  aDiseases of field crops  a2nd Ed.  b"TataMcgrsw-hill publishing company, 1956"  a517p.  aPlant disease