Dua, Shyam <br/><br/>
Big book of inventions 

 - New Delhi:  Tiny Tot,  2009 
 - 128 p. : col. ill. 
<br/><br/><label>ISBN: </label>9788175736979 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General Knowledge
<br/><br/><label>Dewey Class. No.: </label>001 DUA