How things work  : the universal encyclopedia of machines 

 - London  ; Paladin  , 1973 
 - 590p. 
<br/><br/><label>ISBN: </label> 25 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering<br/>Mechanical Engineering
<br/><br/><label>Dewey Class. No.: </label>621  / HOW