Columbia subject headings:
Harvard subject headings:
Greece--History--Age of Tyrants, 7th century B.C.-6th century B.C.
Greece--History--Age of Tyrants, 7th-6th centuries B.C.
Greece--History--Geometric period, ca. 900 B.C.-700 B.C.
Greece--History--Geometric period, ca. 900-700 B.C.
Princeton subject headings:
Greece--History--Age of Tyrants, 7th-6th centuries B.C.
Greece--History--Geometric period, ca. 900-700 B.C.