References (PDF version) External links Handbuch der Geschichte : aus den Handschriften der k.k. Hofbibliothek zu Wien, der herzoglichen Bibliothek zu Gotha und der Universitäts-Bibliothek zu Leyden (1850), ed.: Ferdinand Wüstenfeld An extract from Ibn Kutaiba's 'Adab al-Kâtib; or, The writer's guide (1877), ed.: William Oliver Sproull Ibn Kutaiba's Adab-al-kâtib. Nach mehreren Handschriften hrsg. von Max Grünert (1900), ed.: Max Grünert Liber poesis et poetarum (1904), ed.: Michael Jan de Goeje 874 deaths People from Merv 9th-century Iranian mathematicians Scientists who worked on qibla determination 9th-century Iranian astronomers Year of birth unknown Men centenarians Iranian centenarians 766 births Mathematicians from the Abbasid Caliphate Astronomers from the Abbasid Caliphate Astronomers of the medieval Islamic world