Osborne, Mary Pope <br/><br/>
Polar bears Past Bedtime / 
by Mary Pope Osborne; ill. by Sal Murdocca. 
 - New York :  Scholastic Inc.,  1998. 
 - 71 p. :  ill ;  20 cm. 
 - Magic Tree House  12 .
<br/><br/><label>ISBN: </label>0590706381 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Magical adventures--Fiction