000 00296nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aEaul O.Heady
245 0 _aEconomics of Agrl. Production and research use
260 _bprentice hall
260 _c1964
365 _b15.00
942 _cBK
999 _c194772
_d194772