Columbia subject headings:
Prayer--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ.
Prayer--Soviet Union.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Liturgy.
Harvard subject headings:
Prayer--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ
Prayers.
Soviet Union--Religion.
Princeton subject headings: