Plio︠t︡sen i pleĭsto︠t︡sen Volgo-Uralʹskoĭ oblasti = Pliocene and Pleistocene of the Volgo-Ural area - ︠I︡Akhimovich, Varvara Lʹvovna; Kamaletdinov, M. A. (Murat Abdulkhakovich) (Izd-vo "Nauka,", 1981)