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81
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82Za marksicheska istorii︠a︡ na Bŭlgarii︠a︡ ; statii, dokladi, izkazvanii︠a︡, ret︠s︡enzii (1938-1954).by Pavlov, Todor“...Bulgaria History....”
Published 1954
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83
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84Istorii︠a︡ na bŭlgarskiĭ narod /История на българский народ /by Bobchev, Stefan S. (Stefan Savov), 1853-1940“...Bulgaria History....”
Published 1881
Book -
85Kratka istorii︠a︡ na bŭlgarskii︠a︡ narod /Кратка история на българския народ /by Mitev, Ĭono“...Bulgaria History....”
Published 1951
Book -
86Istorii︠a︡ na Bŭlgariti︠e︡ /История на Българитѣ/by Jireček, Konstantin, 1854-1918“...Bulgaria History....”
Published 1939
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87
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88Published 1981“...Bulgaria History 1941-1944....”
Book -
89Published 1984“...Macedonia History 1878-1912....”
Book -
90
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91Published 1983“...Bulgaria History Congresses....”
Conference Proceeding Book -
92Published 1969“...Bulgaria History Sources....”
Book -
93
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94
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95Published 1957“...Bulgaria History Periodicals....”
Journal -
96
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97Published 1966“...Balkan Peninsula History....”
Book -
98I︠U︡bileĭna kniga na grad Sofii︠a︡, 1878-1928 /Юбилейна книга на град София, 1878-1928 /Published 1928“...Sofia (Bulgaria) History....”
Book -
99
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100Published 1976“...Bulgaria History Literary collections....”
Book