Hawking, Stephen <br/><br/>
A Brief History of Time:  From The Big Bang To Black Holes / 
by Stephen Hawking 
 - London:  Bantam Books,  1995 
 - p.219 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Astronomy
<br/><br/><label>Dewey Class. No.: </label>523.1  / HAW-B