Columbia subject headings:
Rome--History--53-44 B.C.
Rome--History--Civil War, 43-31 B.C.
Harvard subject headings:
Rome--History--53 B.C.-44 B.C.
Rome--History--Civil War, 43 B.C.-31 B.C.
Princeton subject headings:
Rome--History--53-44 B.C.
Rome--History--Civil War, 43-31 B.C.