Guidelines :  development of national parks and protected areas for tourism. 

 - Madrid, Spain ;  Paris, France :  World Tourism Organization ;  United Nations Environment Programme,  1992. 
 - ii, 53 p. :  col. ill. 
<br/><br/><label>ISBN: </label>928440260 
<br/><br/><label>Subjects--Topical Terms: </label><br/>National parks and reserves--Reservation systems.<br/>National parks and reserves.<br/>Ecotourism.