Cobia, David W. <br/><br/>
Sunflower  : production and marketing 

 - Rev. ed. 
 - Fargo :  North Dakota Agricultural Experiment Station,  1978 
 - 73 p.  : ilus. 
 - Extension bulletin  ;25 .
 - Extension bulletin  ;25 .
<br/><br/><label>LCCN: </label>22035 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Girasol.<br/>Girasol--Aspectos económicos.