000 00279nam a2200121Ia 4500
008 170101s1982 xx 000 0 und d
082 _a631.416 S78N
100 _aSTEVENSON, F.J
245 0 _aNitrogen in agriculture soils
260 _c1982
300 _a940p
942 _2ddc
_cB
999 _c95121
_d95121