Commercial arithmatic & elements of statistics 
By S.C. Chanda 
 - 4th ed. 
 - Ludhiana:  Kalyani publishers,  2005. 
 - x,298p. 
<br/><br/><label>ISBN: </label>81-272-2092-2 
<br/><br/><label>Subjects--Index Terms: </label>Arithmetic Commercial arithmatic & elements of statistics 
<br/><br/><label>Dewey Class. No.: </label>513