Columbia subject headings:
Harvard subject headings:
Rome--History--Empire, 30 B.C.-284 A.D.--Historiography.
Rome--History--Empire, 30 B.C.-284 A.D.--In literature.
Princeton subject headings:
Rome--History--Empire, 30 B.C.-284 A.D.--Historiography.
Rome--History--Empire, 30 B.C.-284 A.D.--In literature.