Wald, R M <br/><br/>
Black holes as agents of magnetic fields.  [electronic resource] 

 -  Nature  Sep 1971 
 - 52-3 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0028-0836 
<br/><br/><label>Standard No.: </label>10.1038/233052a0  doi