000 00272nam a2200121Ia 4500
008 180721s9999 xx 000 0 und d
100 _aJOHN CHARLES WALKERQ
245 0 _aDISEASES OF VEGETABLE CROPS
260 _bNil
260 _c1952
365 _b0.00
942 _cBK
999 _c163623
_d163623