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Greek and German on opposite pages · Possibly an edition by Damianus, the son or pupil of Heliodorus of Larissa, of this latter's work on optics · Mode of access: Internet
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Ebook · Damianos Schrift über Optik. Mit Auszügen aus Geminos · Heliodorus, of Larissa, Schöne, Richard, 1840-1922, Geminus, Damianus · Internet Archive
bub_upload · Optics