Barnard, E E <br/><br/>
ASTRONOMY.  [electronic resource] 

 -  Science (New York, N.Y.)  May 1881 
 - 236-7 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.os-2.48.236  doi