Wolf, Fred Alan. <br/><br/>
Parallel universes :   the search for other worlds /  
Wolf, Fred Alan. 
 - New York :   Simon and Schuster,   c1988. 
<br/><br/><label>ISBN: </label>9780586091043 
<br/><br/><label>Dewey Class. No.: </label>530.1  / WOL