Our national parks : America's spectacular wilderness heritage. 

 - 3rd. ed. 
 - Pleasantville, N.Y. :  Reader's Digest Association,  1991. 
 - 352 p. :  col. ill. ;  29 cm. 
<br/><br/> At head of title: Reader's digest.  Includes index 
<br/><br/>Describes the wilderness heritage of our national parks through text and photographs 
<br/><br/><label>ISBN: </label>089577336 
<br/><br/><label>Subjects--Topical Terms: </label><br/>National parks and reserves--United States