Columbia subject headings:
Geology, Stratigraphic--Quaternary.
Geomorphology--Caspian Sea Lowland (Kazakhstan and Russia)
Paleoclimatology--Caspian Sea Lowland (Kazakhstan and Russia)
Harvard subject headings:
Geology, Stratigraphic--Quaternary
Geomorphology--Caspian Depression.
Paleoclimatology--Caspian Depression.
Princeton subject headings:
Geology, Stratigraphic--Quaternary.
Geomorphology--Caspian Depression.
Paleoclimatology--Caspian Depression.