Singh, Umesh Kumar, Au. <br/><br/>
Fortifications in ancient India : a study of protohistoric cultures 

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 -  New Delhi, Kaveri Books  2011 
 - XXII+210 
<br/><br/> 10709 
<br/><br/><label>ISBN: </label> 1750 
<br/><br/><label>Dewey Class. No.: </label>934  / SIN-F