Quinn, Robert. <br/><br/>
Earth then and now / 
by Robert, Quinn. 
 - 1st ed. 
 - 56 p. ;  color illustrations ;  21 cm. 
 - Oxford read and discover. Discover! 6 .
<br/><br/> LC copy imperfect: accompanying sound recording wanting. 
<br/><br/><label>ISBN: </label>9780194645652 (pbk.) 
<br/><br/><label>LCCN: </label>2012360185 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth (Planet)--Juvenile literature.<br/>Earth sciences--Juvenile literature.
<br/><br/><label>Dewey Class. No.: </label>428.24  / QUI