Munroe,Randal <br/><br/>
What If  / 
Randal Munroe 
 - Great Britain:  John Murray,  2014 
 - 303 p.:  ill.;  18cm 
<br/><br/> Includes References 
<br/><br/><label>ISBN: </label>9781848549579 (hbk) 
<br/><br/><label>LCCN: </label>9781848549586 9781848549579 184854958X 
<br/><br/><label>LC Class. No.: </label>Q 173