Evolucion del turismo a nivel mundial 1950-1991 / Organizacion Mundial del Turismo
COTA(S): 2436
Impact of the gulf crisis on international tourism : WTO special report / Organisation Mondiale du Tourisme
COTA(S): 2389
Assemblée Generale : neuvième session, Buenos Aires (Argentine), 30 sep.-4 oct. 1991 / Organisation Mondiale du Tourisme
COTA(S): 1521-IX
Tourism Market Trends: Europe / World Tourism Organization
COTA(S): RE-18/1