Title: Stratigrafii︠a︡, litologii︠a︡, paleogeografii︠a︡ i neftegazonosnostʹ paleozoi︠a︡ Alzhirskoĭ Sakhary
Subjects: Stratigraphic Geology, Geology, Petroleum, Natural gas
Places: Sahara
Time periods: Paleozoic