Hughes, Harold D. <br/><br/>
Crop production:  principles and practices/ 
Harold D. Hughes and Edwin R. Henson; revised by Harold D. Hughes, Darrel Metcalfe and Iver J. Johnson 
 - New York:  Macmillan,  c1957 
 - xii,:  ill.;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> $ 7.25 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Field crops--Genetics<br/>Crop science<br/>Food crops<br/>Forage plants<br/>Energes crops
<br/><br/><label>Dewey Class. No.: </label>633