000			00326nam a2200133Ia 4500
005			20260224040810.0
008			260224s9999||||xx |||||||||||||| ||und||
082			_a338.1 HEA
100			_aHeady, E.O.
245		0	_aAgricultural production function
260			_aIOWA: State University Press _c1961
300			_a667
942			_cBK
999			_c763 _d763