000			00325nam a2200133Ia 4500
008			130225s9999 xx 000 0 und d
100			_aCurtiss, C.F.
245			_aIowa farm management surveys
260			_aIowa _c1921
300			_a357-375 p.
440			_aIowa Agricultural Experiment
901			_a21736
942			_cB _2udc
999			_c3605 _d3605