Columbia subject headings:
Harvard subject headings:
Canon law--Early church, ca. 30-600.
Canon law--Orthodox Eastern Church.
Church history--Primitive and early church, ca. 30-600--Sources.
Councils and synods, Ecumenical--History--Sources.
Councils and synods--History--Sources.
Princeton subject headings:
Canon law--Early church, ca. 30-600.
Canon law--Orthodox Eastern Church.
Church history--Primitive and early church, ca. 30-600--Sources.
Councils and synods, Ecumenical--History--Sources.
Councils and synods--History--Sources.