000			00348nam a2200145Ia 4500
008			130223s9999 xx 000 0 und d
100			_aFree, G.R.
245			_aMinimum tillage for corn production
260			_aNew York
260			_c1970
300			_a0.5
440			_aNo. 1030; Cornell University o
901			_pS17880
942			_cB _2udc
999			_c127831 _d127831