Singh,Upinder <br/><br/>
Pracheena, Poorva Madhyakala Indiacharithram: Silayugam Muthal Panthrandam Noottandu vare 
by Upinder Singh 
 - Kottayam  :DC Books  ,2019 
 - 863p. 
<br/><br/><label>ISBN: </label>978-93-5282-477-9 
<br/><br/><label>Dewey Class. No.: </label>891.463UPI/P