Proceedings 

 - Crookston, Minn. :  University of Minnesota,  1968 
 - 139 p.  ; apénd. 
<br/><br/><label>LCCN: </label>26168 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Girasol.
<br/><br/><label>Dewey Class. No.: </label>635.93355  / I5 1968