Resource productivity, returns to scale, and farm size 
edited by Earl O. Heady...[et. al.] 
 - Ames  Iowa State College Press  1956 
 - 208p. 
<br/><br/> Assembled and published under the sponsorship of the North Central Farm Management Research Committee 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Productivity accounting<br/>Farm management --Research
<br/><br/><label>Dewey Class. No.: </label>Z48 H345