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Интернет източници:
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http://www.tourism.government.bg/bg/kategorii/statisticheski-danni
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https://www.nsi.bg/bg/content/2000/сателитни-сметки-за-туризма
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https://www.dnevnik.bg/biznes/companii/2016/02/10/2702223_raiuneur_shte_leti_po_oshte_pet_novi_destinacii/.
http://ec.europa.eu/regional_policy/bg/policy/themes/tourism/
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