Columbia subject headings:
Harvard subject headings:
Paleobotany--Tertiary
Palynology--Russia (Federation)--Chukotskiĭ nat︠s︡ionalʹnyĭ okrug.
Palynology--Russia (Federation)--Sakha.
Palynology--Russia (Federation)--Siberia.
Princeton subject headings:
Paleobotany--Tertiary.
Palynology--Russia (Federation)--Chukotskiĭ nat︠s︡ionalʹnyĭ okrug.
Palynology--Russia (Federation)--Sakha.
Palynology--Russia (Federation)--Siberia.