Shakirov ZG, Bagautdinov AR. To The Question Of Urbanization In The Territory Of The Pre-Mongol Volga Bulgaria. Rev. Publicando [Internet]. 2017 Dec. 12 [cited 2025 Jan. 8];4(13 (3):992-1000. Available from: https://revistapublicando.org/revista/index.php/crv/article/view/1022