Gardner, Martin <br/><br/>
Relativity simply explained / 
by Martin Gardner; illustrated by Anthony Ravielli 
 - 1st ed. 
 - Mineola, New York:  Dover Publications, Inc.  c.1997. 
 - viii, 179p. 
<br/><br/><label>ISBN: </label>9780486293158 
<br/><br/><label>Dewey Class. No.: </label>CN  / N7