Bethune, Helen <br/><br/>
Why do glaciers grind? : and other extreme questions 
Helen Bethune 
 - Cambridge  Cambridge University Press  c2009 
 - 24 p. : col. ill. ; 23 cm 
<br/><br/><label>ISBN: </label>9780521743747 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>555.312 BET