Britannica Lessons:Book IX Mthematics:Commercial Mathematics 

 - New Delhi:  Encyclopedia  Britannica,  2002. 
 - 71p.;  27cm 
<br/><br/><label>ISBN: </label>8179910318 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Commercial Mathematics
<br/><br/><label>Dewey Class. No.: </label>510  / BRI