000 00285nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aWalter W.Willer
245 0 _aEconomics of american agriculture
260 _bPrentice hall
260 _c1960
365 _b63.18
942 _cBK
999 _c196186
_d196186