Metcalfe, Darrel S.,  1913- <br/><br/>
Crop production :  principles and practices / 
Darrel S.  Metcalfe, Donald M. Elkins. 
 - 4th ed. 
 - New York :  Macmillan,  1980. 
 - ix, 774 p. :  ill. ;  25 cm. 
<br/><br/> First-2d ed. by H. D. Hughes and E. R. Henson; 3d ed. by H. D.  Hughes and D. S. Metcalfe. 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>0023807105 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Field crops.
<br/><br/><label>LC Class. No.: </label>SB185  / M48 1980