Heady Earl O <br/><br/>
Resource demand and structure of the agricultural 

 -  1963 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Management
<br/><br/><label>Dewey Class. No.: </label>X9(J):89P, K3