Columbia subject headings:
Harvard subject headings:
Optics--Historiography--To 1500.
Optics--History--To 1500--Sources.
Ptolemy, active 2nd century. Optics.
Princeton subject headings:
Optics--Historiography--To 1500.
Optics--History--To 1500--Sources.
Ptolemy, active 2nd century. Optics.