Heady Earl O AND OTHERS <br/><br/>
Roots of the farm problem    Changing technology, c    

 - Iowa State University Centre for Agricultural and Economic Development .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture Insdustry
<br/><br/><label>Dewey Class. No.: </label>X9J.73.N6, K5