000 003530000a22001570004500
060 _a100
082 _a633.089 3 DIC
100 _aDickson, James G
245 _aDiseases of field crops
250 _a2
260 _aNew York, Mc Graw- Hill Book Company Inc
260 _c1956
300 _a517
650 _aDiseases- field crops
942 _cBK
999 _c363820
_d363820