Columbia subject headings:
Rome--History--Augustus, 30 B.C.-14 A.D.
Rome--Politics and government--30 B.C.-284 A.D.
Rome--Politics and government--30 B.C.-68 A.D.
Harvard subject headings:
Rome--History--Augustus, 30 B.C.-14 A.D.
Rome--Politics and government--30 B. C.-14 A. D.
Princeton subject headings: