Columbia subject headings:
Harvard subject headings:
Mordovii︠a︡ (Russia)--History.
Mordovii︠a︡ (Russia)--Relations--Soviet Union.
Soviet Union--Relations--Russia (Federation)--Mordovii͡a
Princeton subject headings:
Mordovskai︠a︡ A.S.S.R. (R.S.F.S.R.)--History.