Columbia subject headings:
Eurasia--Antiquities.
Nomads--Eurasia--History.
Social structure--Eurasia--History.
Harvard subject headings:
Eurasia--Antiquities.
Nomads--Eurasia--History.
Social structure--Eurasia--History.
Princeton subject headings:
Eurasia--Antiquities.
Nomads--Eurasia--History.
Social structure--Eurasia--History.