Serbo-Bulgariar Gerra (Basque Wikipedia)

Analysis of information sources in references of the Wikipedia article "Serbo-Bulgariar Gerra" in Basque language version.

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archive.org

Anderson, Frank Maloy; Hershey, Amos Shartle. (1918). Handbook for the Diplomatic History of Europe, Asia, and Africa 1870-1914. Washington, DC: National Board for Historical Service, Government Printing Office, 124–126 or..
Kennan, George Frost. (1979). The Decline of Bismarck's European Order: Franco-Russian Relations, 1875-1890. , 103-222 or..