Columbia subject headings:
Hittites--Civilization--Sources.
Hittites--Civilization.
Hittites--Kings and rulers--Sources.
Harvard subject headings:
Hittites--Civilization--Sources.
Hittites--Civilization.
Hittites--Kings and rulers--Sources.
Princeton subject headings:
Hittites--Civilization--Sources.
Hittites--Kings and rulers--Sources.