Weber, Rebecca, <br/><br/>
Who Knew? / 
Rebecca McEwen. 
 - 28 pages :  illustrations ;  22 cm. 
 - CSI chapters. Level T .
 - CSI chapters.  Level T. .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9781604578898 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions--Juvenile litrature.<br/>Inventors--Juvenile litrature.
<br/><br/><label>Dewey Class. No.: </label>621.381