Columbia subject headings:
North America--Civilization--Congresses.
Siberia, Northern--Civilization--Congresses.
Harvard subject headings:
Eskimos--Congresses.
Ethnology--Russia (Federation)--Siberia--Congresses
Indians of North America--Congresses.
Princeton subject headings:
North America--Civilization--History--Congresses.
Siberia (Russia)--Civilization--History--Congresses.