Columbia subject headings:
Asia--History.
Europe, Eastern--History.
Nomads--Asia--History.
Nomads--Europe, Eastern--History.
Steppes--Asia.
Steppes--Europe, Eastern.
Harvard subject headings:
Asia--History
Europe, Eastern--History.
Princeton subject headings:
Asia--History.
Europe, Eastern--History.
Nomads--Asia--History.
Nomads--Europe, Eastern--History.
Steppes--Asia.
Steppes--Europe, Eastern.