Osborne, Mary Pope <br/><br/>
Polar Bears and the Arctic :  a nonfiction companion to Polar Bears Past Bedtime / 
by Mary Pope Osborne and Natalie Pope Boyce. 
 - 1st 
 - New York, New York :  Random House Children's Books,  2007. 
 - 119 p. 
 - Magic Tree House Research Guide .
<br/><br/> a nonfiction companion to Polar Bears Past Bedtime. 
<br/><br/><label>ISBN: </label>9780375832222 
<br/><br/><label>Subjects--Topical Terms: </label><br/>polar bear--juvenile literature<br/>arctic regions--juvenile literature