000 00321nam a2200133Ia 4500
008 170101s1984 xx 000 0 und d
020 _a125482809
082 _a631 PEA
100 _aPearson, C.J
245 0 _aControl of crop productivity
260 _aNew York
_bAcademic
_c1984
300 _a315p.
942 _2ddc
_cBK
999 _c208031
_d208031