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2.		General guidelines for using data on international air-passenger traffic for tourism analysis / World Tourism Organization Data Publicação: 2002 Col.autor: OMT COTA(S): 9154
3.		Tourisme horizon 2020: prévions globales et profils des segments de marché / Organisation Mondiale du Tourisme Data Publicação: 2002 Col.autor: OMT COTA(S): 8341-VII