Vygodsky, M. <br/><br/>
Mathematical handbook: Elementary mathematics 

 - Moscow  Mir Publishers  1979 
 - 422p. 
<br/><br/><label>ISBN: </label> RS 100.00 
<br/><br/><label>Source: </label> RS 100.00 
<br/><br/><label>Dewey Class. No.: </label>510.2 VYG