Columbia subject headings:
Astronomy, Greek--Early works to 1800.
Calendar, Greek--Early works to 1800.
Omens--Early works to 1800.
Harvard subject headings:
Astronomy, Greek--Early works to 1800.
Calendar, Greek--Early works to 1800.
Comets--Early works to 1800
Divination--Early works to 1800
Earthquakes--Early works to 1800.
Omens--Early works to 1800.
Princeton subject headings: