Vygodsky, M.  <br/><br/>
Mathematical Handbook:  Elementary methametics / 

 - New Delhi,  CBS,  c2004. 
 - 422 p. ;  ill. ;  22 cm.  
<br/><br/><label>ISBN: </label>8123903103 
<br/><br/><label>Dewey Class. No.: </label>512.1