000			00351nam a2200133Ia 4500
008			130225s9999 xx 000 0 und d
100			_aRussel, J.C.
245			_aNitrate production as affected by grain crop residues on the surface of the soil
260			_aNebraska _c1943
300			_a21p
440			_aNo.131
901			_a24744
942			_cB _2udc
999			_c4682 _d4682