Columbia subject headings:
Harvard subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ
Princeton subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Russia.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Ukraine.