Machines & inventions. 

 - Alexandria, Va. :  Time-Life,  1994. 
 - 151 p. :  col. ill. ;  31 cm. 
 - Understanding science & nature .
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Discoveries in science--Juvenile literature.<br/>Inventions--Juvenile literature.<br/>Machinery--Juvenile literature.
<br/><br/><label>LC Class. No.: </label>TJ147  / .M22 1994