Analysis of information sources in references of the Wikipedia article "Velingrad" in English language version.
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: CS1 maint: location missing publisher (link) Archived 2009-02-27 at the Wayback Machine{{cite book}}
: CS1 maint: location missing publisher (link) Archived 2009-02-27 at the Wayback Machine{{cite book}}
: CS1 maint: location missing publisher (link)