000 00302nam a2200121Ia 4500
008 140317s9999 xx 000 0 und d
082 _a631.5
100 _aWareing,P.F.
245 _aPotential crop production.
260 _aLondon
_bHeinemann Educational Books
_c1971
300 _a387
942 _2ddc
_cBK
999 _c6995
_d6995