National geographic :  the truth about black holes / 
edited by Chris Johns. 
 - Washington :  National Geographic,  2014. 
 - p. 
 -  Vol. 225/No. 3 March 2014 .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Anthropology--Journal.<br/>Magazine.