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1by Bezikovich, E. I. (Ekaterina Ivanovna)Subjects: “...Bulgarian language Textbooks for foreign speakers Russian....”
Published 1957
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2by Bernshteĭn, S. B. (Samuil Borisovich), 1911-1997Subjects: “...Bulgarian language Textbooks for foreign speakers Russian....”
Published 1948
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3Published 1955Subjects: “...Bulgarian language Textbooks for foreign speakers German....”
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4