Chief Researcher of the Section of Turkic languages (now the Department of Ural-Altaic Languages)
Soviet and Russian linguist and specialist of Turkic languages. Obtained a PhD degree (1950) and an academic title of professor (1969). Specialist in Turkic and Altaic linguistics (theoretical grammar, descriptive linguistics, lexicography, comparative and historical linguistics). He wrote the first detailed grammatical descriptions of a number of Turkic languages, including the Karakalpak language, the Nogai language and its dialects, the Altaic language and its Northern dialects. He developed one of the most popular classifications of Turkic languages and was in charge of compiling bilingual dictionaries of Turkic languages of the Soviet Union. He wrote 32 books, including the monographs 'Russkie familii Tjurkskogo proisxoždenija' [Russian surnames of Turkic origin], 'Tjurkskaja leksika v “Slove o polku Igoreve”' [Words of Turkic origin in “The Tale of Igor's Campaign], a study guide 'Vvedenie v izučenie tjurkskix jazykov' [Introduction to the study of Turkic languages], a generalizing work 'Altajskaja sem'ja yazykov i eë izučenie' [Altaic language family and its study].