Columbia subject headings:
Harvard subject headings:
Greece--History--Age of Tyrants, 7th century B.C.-6th century B.C.
Hipparchus, -514 B.C.
Pisistratus, 605? B.C.-528 B.C. or 527 B.C.
Princeton subject headings:
Greece--History--Age of Tyrants, 7th-6th centuries B.C.
Hipparchus, -514 B.C.
Pisistratus, 605 B.C.?-528 B.C. or 527 B.C.