Columbia subject headings:
Greece--Foreign relations.
Hostages--Greece.
Hostages--Rome.
Rome--Foreign relations.
Harvard subject headings:
Classical antiquities.
Greece--Foreign relations.
Hostages--Greece--History.
Hostages--History.
Hostages--Rome--History.
Political kidnapping--History.
Rome--Foreign relations.
Princeton subject headings:
Greece--Foreign relations.
Hostages--Greece.
Hostages--Rome.
Rome--Foreign relations.