What if...? :   75 fascinating questions and answers. 

 - New York :  Gramercy Books,  2002. 
 - xiii, 139 p.:  22 cm. 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>978-0-517-22984-2 
<br/><br/><label>LC Class. No.: </label>502 W55 2007