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Bingley: Emerald Group Publishing Limited, 2017
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Madrid , España: World Tourism Organizacion ( UNWTO ), 2014
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Hamburg: Hoffmann und Campe, 2010
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Madrid, Spain: World Tourism Organization (UNWTO), 2011
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Amsterdam; Heidelberg [u.a.]: Elsevier, 2010
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Frankfurt, M.; Berlin; Bern; Bruxelles; New York, NY; Osford; Wien: Lang, 2010-[2012] ; München: Martin Meidenbauer, 2010 / 2010-2012
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Oxon [u.a.]: CAB International, 1998
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Heidelberg: Physica-Verlag, 2008
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Paris: European Conference of Ministers of Transport, 2000
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Mandaluyong City, Metro Manila, Philippines: Asian Development Bank, March 2022
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Madrid, Spain: World Tourism Organization (UNWTO), 2022
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Singapore: Springer Singapore, 2022. ; Singapore: Imprint: Springer, 2022.
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Madrid, Spain: World Tourism Organization (UNWTO), 2022
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Bangkok, 1987
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Bangkok, 1987
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Bangkok, 1987
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Bangkok, 1987
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Bangkok, 1987
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Bangkok, 1987