What about relative corruption? The impact of the relative corruption on the inbound tourism to Turkey / Ender Demir and Giray Gozgor
An empirical analysis of the influence of macroeconomic determinants on World tourism demand / Luís Filipe Martins, Yi Gan and Alexandre Ferreira-Lopes
Republic of Ireland / John McEniff
Tourisme 1987 : statistiques annuelles / European Communities, Commission, Eurostat