Columbia subject headings:
Harvard subject headings:
Christianity--Russia (Federation)--Chuvashia.
Chuvashia (Russia)--Church history.
Chuvashia (Russia)--History--19th century.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Russia (Federation)--Chuvashia.
Princeton subject headings:
Christianity--Russia (Federation)--Chuvashia.
Chuvashia (Russia)--Church history.
Chuvashia (Russia)--History--19th century.