000 00274nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aEarl.O.Heady
245 0 _aFarm management economics
260 _bPrentice hall
260 _c1964
365 _b12.60
942 _cBK
999 _c196846
_d196846