000 00395nam a2200145Ia 4500
008 130223s9999 xx 000 0 und d
100 _aThorfinnson, T.S., Epp, A.W.
245 _aCost of operating tillage and harvesting machinery in Nebraska
260 _aNebraska
260 _c1963
300 _a22 p.
440 _aNo. 475; Nebraska Agricultural
901 _pS27668
942 _cB
_2udc
999 _c119092
_d119092