Columbia subject headings:
Harvard subject headings:
Greece--History--Persian Wars, 500 B.C.-449 B.C.
Greece--History--Persian Wars, 500-449 B.C.
Thermopylae, Battle of, Greece, 480 B.C.
Princeton subject headings:
Greece--History--Persian Wars, 500-449 B.C.
Thermopylae, Battle of, Greece, 480 B.C.