000 00329nam a2200133Ia 4500
008 130225s9999 xx 000 0 und d
100 _aEmerson, Paul
245 _aSoil inoculation with azotobacter
260 _aLowa
_c1918
300 _a28-64 p.
440 _aResearch Bulletin No. 45 Lowa
901 _a21884
942 _cB
_2udc
999 _c3696
_d3696