User:Ruud Koot/al-Khwarizmi
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- Encyclopedias
- Brockhaus: persischer Mathematiker und Astronom
- Columbia Encyclopedia: Arab mathematician
- Encarta: Arab mathematician
- Encyclopedia Britannica: Muslim mathematician
- Encyclopedia Britannica (students edition): Arab mathematician
- Winkler Prins: islamitisch wiskundige
- Dictionaries
- American Heritage Dictionary: Arab mathematician
- Meriam-Webster: Islamic (Persian-born) mathematician
- Oxford English Dictionary: Persian???
- Academic
- MacTutor: Does not mention his etnicity
- Eric W. Weisstein. al-Khwarizmi and Algortihm: Persian mathematician
- The Islamic World to 1600 / The University of Calgary: Does not mention his etnicity
- Jeff Oaks, Associate Professor of Mathematics (Specialty: History of Arabic/Islamic Mathematics), University of Indianapolis Was al-Khwarizmi an applied algebraist?: Clearly states that al-Khwarizmi was a Persian.