Stoskopf, N .C. <br/><br/>
Understaning crop production. 
N .C Stoskopf 
 - USA  Reston Publishing co.  1981 
<br/><br/><label>ISBN: </label>0835980286 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crop Production
<br/><br/><label>LC Class. No.: </label>SB 185 .S75