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1900 - Unknown
Ottoman map - Treaty of Karlowitz
1900 - Unknown
Ottoman map - Bulgaria, Romania, Hungary, Bosnia
1910 - Unknown
Ottoman map - Bulgaria
1915- Petermanns, Georg.Mitteilungen
Das Bulgarentum auf der Balkanhalbinsel im Jahre 1912
1930-1950 - Unknown
Berlin Muahedesine Gore Avrupada Osmanli Imparatorlugu
1900-c1950
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