000 00324nam a2200133Ia 4500
008 130225s9999 xx 000 0 und d
100 _aDumenil, Lloyd
245 _aNitrogen fertilizers for corn
260 _aIowa
_c1952
300 _a838-855 p.
440 _aIowa Agricultural Experiment
901 _a3573
942 _cB
_2udc
999 _c690
_d690