Wallace, Robert. <br/><br/>
The Grand Canyon / 
by Robert Wallace and the editors of Time-Life Books. With photos. by Ernst Haas. 
 - New York :  Time-Life,  1972. 
 - 184 p. :  ill., maps. 
 - The American wilderness .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>LCCN: </label>71179463 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Grand Canyon (Ariz.)
<br/><br/><label>Dewey Class. No.: </label>508.791