Ragul Sankiruthyayan  ராகுல் சாங்கிருத்யாயன்   <br/><br/>
மனித சமுதாயம் / 
by Ragul Sankiruthyayan ; translated by A G Ethirajulu  
 - 5th ed.  
 - Chennai :   New Century Book House,   2019.  
 - 406p.  
<br/><br/><br/>Tamil  
<br/><br/><label>ISBN: </label>9788123408095 
<br/><br/><label>Subjects--Topical Terms: </label><br/>History 
<br/><br/><label>Dewey Class. No.: </label>301  / RAG/M