Hawking Stephen, Penrose Roger. <br/><br/>
The nature of space and time. 

 - UK:  Princeton University Press,  2010. 
 - viii,145p. 
<br/><br/><label>ISBN: </label>9780691195612 
<br/><br/><label>Dewey Class. No.: </label>530.1  / HAW.N