Osborne, Mary Pope. <br/><br/>
Polar bears past bedtime / 
by Mary Pope Osborne ; illustrated by Sal Murdocca. 
 - 71 páginas :  ilustraciones ;  20 cm. 
 - Magic tree house ;  #12 .
 - Osborne, Mary Pope.  Magic tree house series ;  #12. .
<br/><br/> "A Stepping Stone book." 
<br/><br/> Their magic tree house takes Jack and Annie to the Arctic, where a polar bear leads them onto very thin ice. 
<br/><br/><label>ISBN: </label>0679983414 067988341X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Osos polares--Novela.
<br/><br/><label>LC Class. No.: </label>PZ7.O81167  / Po 1998