Columbia subject headings:
Greek drama (Tragedy)--History and criticism--Early works to 1800.
Tzetzes, John, active 12th century.
Harvard subject headings:
Greek drama (Tragedy)--History and criticism--Early works to 1800.
Tzetzes, John, active 12th century.
Princeton subject headings:
Greek drama (Tragedy)--History and criticism--Early works to 1800.
Tzetzes, John, active 12th century.