Collection of articles. R. G. Kuzeev, V. L. Ivanov. Ethnic processes in the Volga-Ural region in the V-XVI centuries and the problem of the origin of the Chuvash people. V. D. Dimitriev. About the last stages of Chuvash ethnogenesis. V.F. Kakhovsky. Archeology of Volga Bulgaria and issues of ethnogenesis of the Chuvash people. M. R. Fedotov. About Bulgarian and Chuvash languages. I. I. Egorov. Bulgarian-Chuvash-Kypchak ethno-linguistic relations in the XIII-XVI centuries. V.P. Ivanov. To the question of the Chuvash-Tatar ethnocultural parallels. B.V. Kakhovsky. Pre-Christian funeral rite of the Chuvash as material for ethnogenesis. V. G. Rodionov. Ethnocultural features and history of Besermians as evidence of Bulgarian-Chuvash continuity. List of the main works on the problem of ethnogenesis of the Chuvash people. Conditional abbreviations.