Perelman, Ya <br/><br/>
Mathematics can be fun 

 - Moscow  MIR Publishers  1985 
 - 400p. 
<br/><br/><label>ISBN: </label> RS 23.50 
<br/><br/><label>Source: </label> RS 23.50 
<br/><br/><label>Dewey Class. No.: </label>510 PER