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Centre, UNESCO World Heritage. "The World Heritage Convention". UNESCO World Heritage Centre (بالإنجليزية). Archived from the original on 2020-10-03. Retrieved 2020-10-03.
Centre, UNESCO World Heritage. "Austria". UNESCO World Heritage Centre (بالإنجليزية). Archived from the original on 2020-10-03. Retrieved 2020-10-03.
Centre, UNESCO World Heritage. "The Criteria for Selection". UNESCO World Heritage Centre (بالإنجليزية). Archived from the original on 2020-10-03. Retrieved 2020-10-03.