Columbia subject headings:
Cassius Dio Cocceianus.
Herodian.
Scriptores historiae Augustae.
Harvard subject headings:
Cassius Dio Cocceianus--Criticism and interpretation.
Herodian--Criticism and interpretation.
Scriptores historiae Augustae.
Princeton subject headings:
Cassius Dio Cocceianus.
Herodian.
Scriptores historiae Augustae.