Thybony, Scott. <br/><br/>
Canyon country parklands  treasures of the Great Plateau 
ScottThybony ; prepared by the Book Division, National Geographic Society. 
 - Washington, D.C.  National Geographic Society  1993. 
 - 199 p.  col. ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0870449079  donacion 
<br/><br/><label>Subjects--Topical Terms: </label><br/>National parks and reserves--Colorado Plateau.