000			00561cam a22001457a 4500
008			180718b1956 xxu||||| |||| 00| 0 eng d
082			_aZ48 H345
245			_aResource productivity, returns to scale, and farm size _cedited by Earl O. Heady...[et. al.]
260			_aAmes _bIowa State College Press _c1956
300			_a208p.
500			_aAssembled and published under the sponsorship of the North Central Farm Management Research Committee
650			_aProductivity accounting
650			_aFarm management --Research
700			_aHeady, Earl O....[et. al.]
999			_c367978 _d367978