Leiden University Libraries Digital Collections

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[Answers to 4 questions put by al-Bīrūnī] - Or. 168: 4
[A mathematical problem] - Or. 168: 9
[3 mathematical problems] - Or. 168: 10
[Answer to a question put by Abū Ǵaʿfar al-Khāzin] - Or. 168: 12
[On a geometrical problem put by as-Siǵazī and al-Kūhī] - Or. 168: 13
[Treatise on right-angled triangles] - Or. 168: 14