Columbia subject headings:
Harvard subject headings:
Easter.
Holy Week
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Liturgy.
Princeton subject headings:
Easter.
Holy Week.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Liturgy.