Columbia subject headings:
Byzantine chants--History and criticism.
Catholic Church--Byzantine rite, Ruthenian--Liturgy.
Church music--Catholic Church (Byzantine rite)--History and criticism.
Church music--Ukraine--Zakarpatsʹka oblastʹ--History and criticism.
Harvard subject headings:
Byzantine chants--History and criticism.
Music--Ukraine--Zakarpatsʹka oblastʹ--History and criticism.
Princeton subject headings:
Church music--Ukraine--Zakarpatskai︠a︡ oblast.́.
Gregorian chants--History and criticism.