000 00310nam a2200121Ia 4500
008 170101s1999 xx 000 0 und d
082 _a577.5 SMA
100 _aSmaling, E.M.A
245 0 _aNutrient disequilibria in agroecosystems
260 _aWallingford
_bCABI
_c1999
300 _aP.[?]
942 _2ddc
_cBK
999 _c253531
_d253531