Roberts, Roy W.,    1898- <br/><br/>
Modern farming /    
Roy W. Roberts. 
 - 2nd ed. 
 - Chicago :   Lippincott,   1956. 
 - 600 p. :    ill. ;    22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture ----United States.----
<br/><br/><label>Dewey Class. No.: </label>630