Russell, Bertrand ,    1872-1970. <br/><br/>
The ABC of relativity /    
by Bertrand Russell ; edited by Felix, Pi rani. 
 - 3rd rev. ed. 
 - London :   Allen & Unwin,   1969. 
 - 139 p. :    ill. ;    23 cm. 
<br/><br/><label>ISBN: </label>045210012 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Relativity (Physics).--------
<br/><br/><label>Dewey Class. No.: </label>530.1