The World of Machines 

 - Oxford :  Heinemann Educational,  1991. 
 - 64p.;  Col.ill.;  28cm 
<br/><br/><label>ISBN: </label>0-431-00012-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics
<br/><br/><label>Dewey Class. No.: </label>531.8  / WOR