Watt, Ward B <br/><br/>
Nectar resource use by Colias butterflies : Chemical and visual aspects.  [electronic resource] 

 -  Oecologia  Dec 1974 
 - 353-374 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1432-1939 
<br/><br/><label>Standard No.: </label>10.1007/BF00384578  doi