Columbia subject headings:
Church history--Primitive and early church, ca. 30-600.
Fathers of the church.
Harvard subject headings:
Apologetics--History--Sources.
Christian education--History--Early church, ca. 30-600--Sources.
Church history--Primitive and early church, ca. 30-600
Fathers of the church.
Preaching--History--Early church, ca. 30-600--Sources.
Princeton subject headings: