Columbia subject headings:
Geology, Stratigraphic--Quaternary.
Paleobiogeography--Soviet Union.
Paleoclimatology--Soviet Union.
Harvard subject headings:
Geology, Stratigraphic--Quaternary
Paleobiogeography--Soviet Union.
Paleoclimatology--Soviet Union.
Paleontology--Soviet Union
Princeton subject headings:
Geography, Stratigraphic--Quaternary.
Paleobiogeography--Soviet Union.
Paleoclimatology--Soviet Union.