Das, B. <br/><br/>
Commercial arithmetic 
B. Das 
 - 3rd ed. 
 - Calcutta  Premier book 
 - various pages 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business Mathematics
<br/><br/><label>Dewey Class. No.: </label>650.01513  / D229