Gudelines development of national parks and prtotected areas for tourism / 
World Tourism Organization, Terrestrial ecosystes Branch Industry and Environment Programme Activity Centre. 
 - 1st ed. 
 - Madrid, Spain :  World Tourism Organization,  1992. 
 - ii, 53 p. :  ill., maps ;  29 cm. 
<br/><br/>Includes bibliographical references (51-53) and index. 
<br/><br/><label>ISBN: </label>9284400260 
<br/><br/><label>Subjects--Topical Terms: </label><br/>National parks and reserves.