000 003430000a22001450004500
060 _a100
082 _a635.92 WAL
100 _aWalker, John Charles
245 _aDiseases of vegetable crops
260 _aNew York, Mc Graw- Hill Book Company Inc
260 _c1952
300 _a529
650 _aVegetable crops diseases
942 _cBK
999 _c363615
_d363615