Gardner, Martin,  1914- <br/><br/>
Time travel and other mathematical bewilderments/ 
Martin Gardner. 
 - New York:  W.H. Freeman,  c1988. 
 - ix, 295 p.:  ill.;  24 cm. 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>071671924X 0716719258 (pbk.) 
<br/><br/><label>LCCN: </label>87011849 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical recreations.
<br/><br/><label>Dewey Class. No.: </label>510