000 003780000a22001450004500
060 _a100
082 _a338.1 ECO
100 _aHeady, Earl O
245 _aEconomic development of agriculture: the modernization of farming
260 _aAmes, IOWA state university press
260 _c1970
300 _a311
650 _aFarming/agriculture-economic aspects
942 _cBK
999 _c220896
_d220896