Columbia subject headings:
Byzantine chants--History and criticism.
Church music--Orthodox Eastern Church--History and criticism.
Lord's Supper--Orthodox Eastern Church--Liturgy.
Orthodox Eastern Church--Liturgy.
Harvard subject headings:
Byzantine chants--History and criticism.
Church music--Orthodox Eastern Church
Lord's Supper--Orthodox Eastern Church--Liturgy.
Orthodox Eastern Church--Liturgy.
Princeton subject headings:
Byzantine chants--History and criticism.
Church music--Orthodox Eastern Church.
Lord's Supper--Orthodox Eastern Church--Liturgy.
Orthodox Eastern Church--Liturgy.