Hawking, Stephen <br/><br/>
Black holes and baby universe and other essays 

 -  Bantam Books Inc., New York  1993 
 - 173 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Universe; Descriptive astronomy
<br/><br/><label>Dewey Class. No.: </label>PG 523.1  HAW-B