Geology and paleogeographic features of the formation of the lower (Ordovician–Lower Afranian) part of the sedimentary cover of the Volgograd Volga region in connection with oil and gas prospects
Tsygankova, Valentina Aleksandrovna, 1991, Candidate of Sciences dissertation
Geology and paleogeographic features of the formation of the lower (Ordovician–Lower Afranian) part of the sedimentary cover of the Volgograd Volga region in connection with oil and gas prospects — Tsygankova, Valentina Aleksandrovna — 1991 — Russian Dissertation Library