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UNWTO world tourism barometer
World Tourism Organization - Madrid : [Verlag nicht ermittelbar] - 1.2003 -
Persistent link: https://www.econbiz.de/10003375248
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World drug report
Vereinte Nationen / Office on Drugs and Crime; Vereinte … - New York, NY : United Nations - 1997; 2000; 2004 -
Persistent link: https://www.econbiz.de/10009772070
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Global illicit drug trends
Vereinte Nationen / Office for Drug Control and Crime … - New York, NY : [Verlag nicht ermittelbar] - 1999 - 2003
Persistent link: https://www.econbiz.de/10001680081
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Compendium of tourism statistics
World Tourism Organization - Madrid : World Tourism Organization - 2011-
Persistent link: https://www.econbiz.de/10012421452
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Global report on trafficking in persons
Vereinte Nationen / Office on Drugs and Crime - New York, NY : United Nations - 2012-
Persistent link: https://www.econbiz.de/10014375171
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Yearbook of tourism statistics : data ...
World Tourism Organization - Madrid : [Verlag nicht ermittelbar] - 2008-
Persistent link: https://www.econbiz.de/10012421447