Columbia subject headings:
Apologetics--History--Early church, ca. 30-600.
Apostolic Fathers.
Christian heresies--History--Early church, ca. 30-600.
Gnosticism--Controversial literature--Early works to 1800.
Irenaeus, Saint, Bishop of Lyon.
Theology--History--Early church, ca. 30-600.
Harvard subject headings:
Apologetics--Early works to 1800
Christian heresies--History--Early church, ca. 30-600
Christian literature, Early.
Gnosticism--Early works to 1800.
Irenaeus, Saint, Bishop of Lyon
Theology--Early works to 1800
Princeton subject headings:
Apologetics--Early works to 1800.
Gnosticism--Early works to 1800.
Theology--Early works to 1800.