Dowling, Ross K. <br/><br/>
Geotourism 

 -  Elsevier  2006 
<br/><br/> includes references and index 
<br/><br/><label>ISBN: </label>0-7506-6215-8 
<br/><br/><label>Dewey Class. No.: </label>333.78 G29 2006