Columbia subject headings:
Church--Unity.
Council of Constantinople (1st : 381 : Constantinople)
Councils and synods, Ecumenical.
Creeds.
Holy Spirit.
Nicene Creed.
Harvard subject headings:
Church--Unity
Council of Constantinople (1st : 381 : Constantinople)
Councils and synods, Ecumenical.
Creeds.
Holy Spirit.
Princeton subject headings: