Universa Encyclopedia of machines  <br/><br/>
How things work 

 - Great Britain  Granada publication  1975 
 - 591 
 -  2 .
<br/><br/><br/>ENGLISH 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>How things work
<br/><br/><label>Dewey Class. No.: </label>621