Hey, Anthony J. G. <br/><br/>
Einstein's mirror / 
Tony Hey, Patrick Walters. 
 - Cambridge  :  Cambridge University Press,  1997. 
 - xii, 291 p. :  ill. (some col.), maps ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0521435323 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Relativity (Physics).<br/>Gravitation.<br/>Cosmology.