Gondhalekar, Prabhakar. <br/><br/>
The time keepers of the Vedas : history of the calendar of the Vedic period (from Ṛgveda to Vedāṅga jyotiṣa) 

 - New Delhi  Manohar Publishers & Distributors  2013 
<br/><br/><label>ISBN: </label>9788173049699 
<br/><br/><label>Dewey Class. No.: </label>529.3245  / GON