Suggested Topics within your search.
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Published: Sofija : Izd. na Bălg. Akad. na Naukite, 1969
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Published: Sofija : Izd. ba BAN, 1968
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Published: Sofija : Bălg. Akad. na Naukite, 1960
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Published: Sofija : Izd. na Bălgarskata akademija na naukite, 1950
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Published: Sofija : Pečatnica na Bulgarskata Akad. na Naukite, 1949
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