Columbia subject headings:
Apologetics--Early works to 1800.
Arianism--Controversial literature--Early works to 1800.
Marcellus, of Ankara, Bishop of Ankara, approximately 280-approximately 374.
Trinity--History of doctrines--Early church, ca. 30-600.
Harvard subject headings:
Apologetics--Early works to 1800
Apologetics--Early works to 1800.
Arianism--Controversial literature--Early works to 1800.
Marcellus, of Ankara, Bishop of Ankara, approximately 280-approximately 374.
Trinity--Early works to 1800.
Princeton subject headings:
Apologetics--History--Early church, ca. 30-600.
Arianism--Controversial literature--Early works to 1800.
Marcellus, of Ankara, Bishop of Ankara, approximately 280-approximately 374.
Trinity--Early works to 1800.