Explores and exploration.Vol.7: Nataral sciences- Polar exploration 

 - New York  Marshall Cavendish  2005 
 - 560 pages  Color illustrations  29 cm 
<br/><br/><label>ISBN: </label>9780761475422 
<br/><br/><label>Dewey Class. No.: </label>J R 910.922 EXPL