Harrar, Jacob George. <br/><br/>
Principles for progress in world agriculture 

 - New York :  The Rockefeller Fundation,  1966 
 - 16 p. 
<br/><br/><label>LCCN: </label>73970 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura.<br/>Alimentos--Abastecimiento.