Barton, Byron <br/><br/>
Machinery At Work 

 - USA  HarperCollins Publishers Ltd.  1987 
 - 32 
<br/><br/><label>ISBN: </label>978-0-694-01107-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Juvenile Non-Fiction<br/>Machinery & Tools<br/>Science & Technology