Smith, Clarence Beaman. <br/><br/>
The agricultural extension system of the United States 

 - New York :  Wiley,  1930 
 - 402 p.  : ilus. 
<br/><br/><label>LCCN: </label>58012 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educación agrícola--E.U.A.<br/>Extensión agrícola--E.U.A.
<br/><br/><label>Dewey Class. No.: </label>630.717  / S5