Title: Skhema stratigrafii i korreli͡at͡sii srednego i verkhnego devona Volgo-Uralʹskoĭ neftenosnoĭ provint͡sii
Subjects: Stratigraphic Geology, Geology, Paleontology
Places: Russia (Federation), Volga River Valley, Ural Mountains Region
Time periods: Devonian