Columbia subject headings:
Gaul--History--Gallic Wars, 58-51 B.C.
Rome--History--Republic, 265-30 B.C.
Harvard subject headings:
Gaul--History--Gallic Wars, 58 B.C.-51 B.C.
Rome--History--Republic, 265 B.C.-30 B.C.
Princeton subject headings:
Gaul--History--Gallic Wars, 58-51 B.C.
Rome--History--Republic, 265-30 B.C.