Sweeney, Michael S. <br/><br/>
Last unspoiled place :  Utah's Logan Canyon / 

 - Washington, D.C. :  National Geographic,  c2007. 
 - 189 p. :  ill. (chiefly col.), col. maps ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9781426201011 9781426201028 ((dlx)) 
<br/><br/><label>Dewey Class. No.: </label>979 NAT 2007 A114 Or.