Great inventions 

 - Mankato, Minn. :  Creative Education,  1961 
 - 31 p. :  col. ill. ;  23 cm. 
 - It's a fact! .
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions--History--Miscellanea--Juvenile literature.<br/>Inventions--History--Miscellanea.
<br/><br/><label>Dewey Class. No.: </label>609  / BOG 1961