Dubey,Abhay Kumar <br/><br/>
World Famous Unsolved Mysteries 

 - New Delhi  Pustak  1994 
 - p.136 
<br/><br/><label>Subjects--Topical Terms: </label> Iron Pillar  Secret of Mayas 
<br/><br/><label>Dewey Class. No.: </label>001.94 D81W