271. Columbia University Rare Book & Manuscript Library, MS Or 287 Title: De sphaericis Author: Theodosius of Bithynia Place: Tabriz Date: 1895.
272. Columbia University Rare Book & Manuscript Library, MS Or 10 Title: Bīst dar maʻrifat-i usṭurlāb Author: Nasir al-Din al-Tusi Place: Iran Date: 1299.
273. Columbia University Rare Book & Manuscript Library, MS Or 11 Title: Sī faṣl Author: Nasir al-Din al-Tusi Date: 16--?-17--?
274. Columbia University Rare Book & Manuscript Library, MS Or 28 Title: De sphaericis Author: Theodosius of Bithynia Place: 18-- Date: 1800-1899
275. Columbia University Rare Book & Manuscript Library, MS Or 444 Title: Mavāhib-i ilāhī dar tārīkh-i Āl-i Muẓaffar Author: Muín-ad-Din Place: Iran Date: 1431.
276. Columbia University Rare Book & Manuscript Library, MS Or 462 Title: On accounting and commissions Place: Iran Date: 1575-1824.
277. Columbia University Rare Book & Manuscript Library, X8937 Ib66 Title: Tārīkh madīnat Dimashq Author: Ibn 'Asakir Date: approximately 1141.
278. Columbia University Rare Book & Manuscript Library, MS Or 49 Title: Elements Author: Euclid Date: between 1830 and 1899?
279. Columbia University Rare Book & Manuscript Library, MS Or 309 Title: Ḥafīrat al-taʼsīs min taʼlīf al-Qass Alīʻāzar Date: 15--?-16--?
280. Columbia University Rare Book & Manuscript Library, X8937 Ab9 Title: Kitāb al-tārīkh mimmā taqaddama ʻan al-ābāʼ Author: Abu l-Fath Date: 1750?-1850?