Williams, R E <br/><br/>
Absorption lines in quasi-stellar objects with Zabs > Zem.  [electronic resource] 

 -  Nature  Oct 1970 
 - 269-70 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0028-0836 
<br/><br/><label>Standard No.: </label>10.1038/228269a0  doi