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 Books  [1972] 
 - 184 p.  illus. (part col.)  27 cm. 
 - The American wilderness .
<br/><br/>Bibliography: p. 180. 
<br/><br/><label>LCCN: </label>71179463  
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Grand Canyon (Ariz.)
<br/><br/><label>LC Class. No.: </label>F788  / .W23 
<br/><br/><label>Dewey Class. No.: </label>917.9132045 Wal   15