Guidelines, development of national parks and protected areas for tourism

Guidelines, development of national parks and protected areas for tourism : prepared with the assistance IUCN ; Jeffrey A. McNeely, James W. Thorsell, Héctor Ceballos-Lascuráin. Madrid : World Tourism Organization, c1992 ; Paris : United Nations Environment Programme. ii, 53 s. Technical report series ; 13. ISBN 92-844-0026-0.