Bahcall, J N <br/><br/>
What the Longest Exposures from the Hubble Space Telescope Will eveal.  [electronic resource] 

 -  Science (New York, N.Y.)  Apr 1990 
 - 178-83 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.248.4952.178  doi