Syrocki, B. John. <br/><br/>
What is a machine / 
B. John Syrocki. 
 - Chicago :  Benefic Press,  1960. 
 - 48 p. :  ill. ;   20 cm. 
 - The what is it series. .
<br/><br/>323  323 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Machinery--Juvenile literature.
<br/><br/><label>Dewey Class. No.: </label>621.9 / S85w