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3
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Study on visa facilitation in the silk road countries / [ed. by the Regional representation for Asia and the Pacific].
- World tourism organization (WTO),
- cop. 2001.
- Madrid :
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Silk road tourism - current issues : a report... / World tourism organization.
- World Tourism Organization,
- 1998.
- Madrid :
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WTO Silk road forum, Xi'an, China, 17-20 June 1996 : final report / World tourism organization.
- World tourism organization (WTO),
- 1997.
- Madrid :