000 00299nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aFrissel (MJ)
245 0 _aCycling of mineral nutrients in agricultural economics
260 _bElservier
260 _c1978
365 _b408.50
942 _cBK
999 _c203051
_d203051