Heady, Earl Orel. <br/><br/>
Agricultural production functions 

 - Ames :  Iowa State University,  1961 
 - 667 p. 
<br/><br/><label>LCCN: </label>12903 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Aspectos económicos.
<br/><br/><label>Dewey Class. No.: </label>338.1  / H4