Columbia subject headings:
Rome--History--53-44 B.C.
Rome--History--Civil War, 43-31 B.C.
Rome--Politics and government--265-30 B.C.
Harvard subject headings:
Rome--History--Republic, 265 B.C.-30 B.C.
Rome--Politics and government--265 B.C.-30 B.C.
Princeton subject headings:
Rome--History--Republic, 265-30 B.C.
Rome--Politics and government--265-30 B.C.