Columbia subject headings:
Geology, Stratigraphic.
Geology--Russia (Federation)--Siberia.
Paleontology--Carboniferous.
Paleontology--Russia (Federation)--Siberia.
Harvard subject headings:
Princeton subject headings:
Geology, Stratigraphic.
Geology--Russia (Federation)--Siberia.
Paleontology--Carboniferous.
Paleontology--Russia (Federation)--Siberia.