Delorit, Richard J.  1921- <br/><br/>
Crop production / 
Richard J. Delorit, Louis J. Greub, Henry L. Ahlgren 
 - 4th ed. 
 - Englewood Cliffs, N. J. :  Prentice-Hall ,  1974 
 - 744 p. :  ill. ;  24 cm . 
 - Prentice-Hall vocational agriculture series .
<br/><br/>Includes references and index 
<br/><br/><label>ISBN: </label>0131947613 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Field crops