000 00321nam a2200121Ia 4500
008 170101s1991 xx 000 0 und d
082 _a581.133
100 _aGiller Ken E.
245 0 _aNitrogen Fixation in Tropical Cropping Systems
260 _aU.K.
_bCAB International
_c1991
300 _a313 p.
942 _2ddc
_cB
999 _c1113216
_d1113216