Vocabulário comum para os contratos públicos (CPV) / Comunidade Europeia
COTA(S): 6109; 6109-A
Mexico travel & tourism : millennium vision / World Travel & Tourism Council
COTA(S): 6458
United Kingdom travel & tourism : millennium vision / World Travel & Tourism Council
COTA(S): 6457
Australia travel & tourism : a new economic perspective / World Travel & Tourism Council
COTA(S): 6460