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Impact assessment study supporting the review of the Union's visa policy to facilitate legitimate travelling : Final Report
(2013)
Final Report Cost Analysis of Entry- Exit & Registered Traveller Systems : CB-E-SO30-REP-003 ; Framework Contract Quality Assurance –JLS-B3-2007-05
(2010)
Entry-Exit Feasibility Study : Final Report
(2008)
Annuario alberghi d'Italia
(1980)
Statistica del turismo
(1929)
Indagine presso le agenzie di viaggio
(1969)