| 1. | Orientations générales pour l'elaboration d'un compte satellite du tourisme (CST) : mesure de la l'offre touristique / Organisation Mondiale du TourismeData Publicação: 2001 Col.autor: OMT |  | |
| 2. | The German ecotourism market / World Tourism OrganizationData Publicação: 2001 Col.autor: OMT | | |
| 3. | Cultural heritage and tourism development : a report on the international conference on cultural tourism, Siem Reap, Cambodia, 11-13 December 2000 / World Tourism OrganizationData Publicação: 2001 Col.autor: OMT | | |
| 4. | The U. S. ecotourism market / World Tourism OrganizationData Publicação: 2002 Col.autor: OMT | | |