1.		Impact of the gulf crisis on international tourism : WTO special report / Organisation Mondiale du Tourisme Data Publicação: 1991 Col.autor: OMT
2.		Travel & tourism in the world economy : the WTTC report / World Travel & Tourism Council Data Publicação: 1991 Col.autor: World Travel & Tourism Council
3.		Impact of completion of the internal market on the tourism sector : final report / Tecnecon; Commission of the European Communities, DG XXIII Data Publicação: 1991 Col.autor: Tecnecon Co col. autor: Comunidade Europeia. DG XXIII
4.		The evolution in holiday travel facilities and in the flow of tourism inside and outside the European Community (ref. XXIII/Tourism/757/PC/hc) : final report [policopiado] / Tourconsult International, Tourconsult Italy; col. European Travel Data Center Data Publicação: 1991 Co col. autor: Tourconsult International Co col. autor sec.: Comunidade Europeia. Comissão
5.		La formation professionnelle dans le secteur du tourisme / Liliane Müller-Warson; Centre européen pour le développement de la formation professionnelle Autor: Müller-Warson, Liliane Data Publicação: 1991 Co col. autor sec.: Comunidade Europeia. Cedefop