Hornback, Kenneth E. <br/><br/>
Guidelines for public use measurement and reporting at parks and protected areas / 
Kenneth E. Hornback and Paul F. J. Eagles. 
 - First edition 
 - Cambridge :  The World Conservation Union (IUCN),  1999. 
 - 86 p. ;  il. ;  28 cm. 
<br/><br/><br/>Inglés 
<br/><br/><label>ISBN: </label>2831704766  Normal 
<br/><br/><label>Subjects--Index Terms: </label>Conservátion Conservación Protected areas Áreas protegidas 
<br/><br/><label>Dewey Class. No.: </label>333.717