Gunnell, Robert <br/><br/>
This changing world / 
Robert Gunnell 
 - London :  Museum Press,  1958 
 - 143 p. :  ill. ;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> PND 15.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>600