Columbia subject headings:
Astronomy, Greek--Early works to 1800.
Sphere--Early works to 1800.
Spherical astronomy--Early works to 1800.
Harvard subject headings:
Astronomy, Greek--Early works to 1800.
Sphere--Early works to 1800.
Spherical astronomy--Early works to 1800
Princeton subject headings:
Astronomy, Greek--Early works to 1800.
Sphere--Early works to 1800.
Spherical astronomy--Early works to 1800.