Trying, Hardly <br/><br/>
Why didn't i think of that? :   101 inventions that changed the world / 
Hardly Trying. 
 - Avon, MA :  Adams Media,  2010. 
 - xiv, 209 p. : col. ill.:  19 cm. 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>13: 978-1-4405-0010-7 
<br/><br/><label>LC Class. No.: </label>600 R82w