Columbia subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied.
Orthodox Eastern Church--Liturgy.
Vespers (Music)
Harvard subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied.
Princeton subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied.
Communion service music.
Orthodox Eastern Church ǂx Liturgy.
Vespers (Music)