Казанский федеральный университет; Danis K. Nurgaliev; Vladimir V. Silantiev; Svetlana V. Nikolaeva (Kazan University Press, 2015)
Detailed descriptions and new biostratigraphic, paleomagnetic, geochemical, chemostratigraphic, and sedimentological data on the most important type and reference sections of the Ufimian, Kazanian, Urzhumian, and Severodvinian ...