Columbia subject headings:
Catholic Church--Relations--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ.
Protestant churches--Relations--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Relations--Catholic Church.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Relations--Protestant churches.
Harvard subject headings:
Catholic Church--Relations--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ.
Protestant churches--Relations--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Relations--Catholic Church.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Relations--Protestant Churches.
Princeton subject headings:
Catholic Church--Relations--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ.
Protestant churches--Relations--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Relations--Catholic Church.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Relations--Protestant Churches.