The U. S. ecotourism market / World Tourism Organization
The Italian ecotourism market / World Tourism Organization
Le marché de l'écotourisme des États-Unis / Organisation Mondiale du Tourisme
World tourism conference - tourism success stories and shooting stars : Kuala, Lumpur, Malaysia, 4-6 June 2007 / World Tourism Organization
International conference on metropolitan tourism Shanghai, China; 17-18 November 2006 / World Tourism Organization
Tourism and intangible cultural heritage / World Tourism Organization