Young scientist / 
Edited by Childcraft ; Illustrated by Sue Barclay ... [et. al.]. 
 - Chicago :  World Book International,  © 1994. 
 - Vols. :   ill. ;  28 cm. 
<br/><br/> Includes index.<br/> 
<br/><br/>V. 15- Machines at work  ;<br/> 
<br/><br/>314  314 
<br/><br/><label>ISBN: </label>0-7166-6303-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science.<br/>Machinery -- Experiments.
<br/><br/><label>Dewey Class. No.: </label>500 / W893y