National Geographic's guide to the national parks of the United States /  
published by National Geographic Society (U.S.). 
 - 7th ed. 
 - Washington, D.C. :   National Geographic Society,  c2012. 
 - 480 p. :   ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>
<br/><br/><label>ISBN: </label>9781426208690 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Parks--United States--Guidebooks.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Guidebooks.
<br/><br/><label>Dewey Class. No.: </label>917.304  / NAN