1. | Digest of tourist statistics nº 16 / British Tourist AuthorityData Publicação: 1992 Col.autor: Reino Unido. British Tourist Authority COTA(S): 5222.1 | ||
2. | Digest of tourist statistics, nº18 / British Tourist AuthorityData Publicação: 1995 Col.autor: Reino Unido. British Tourist Authority COTA(S): 5222.2 | ||
3. | Portugal: visitor traffic to the UK : a market summary / British Tourist AuthorityData Publicação: 1997 Col.autor: Reino Unido. British Tourist Authority COTA(S): 7128 |