Bulgária do Volga (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Bulgária do Volga" in Portuguese language version.

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worldcat.org

Bolʹshai︠a︡ rossiĭskai︠a︡ ėnt︠s︡iklopedii︠a︡. I︠U︡. S. Osipov, Ю. С. Осипов. Moskva: Большая российская энциклопедия. 2004. OCLC 57660759