Abdullah, Hassan, and Musa Ibrahim. “Sources of Astronomical Knowledge Among Muslims During the Abbasid Era (132-656 AH / 750-1258 AD): ‘Indian and Persian Sources As an example’”. Humanities Journal of University of Zakho 11, no. 3 (September 30, 2023): 653–661. Accessed May 20, 2024. https://hjuoz.uoz.edu.krd/index.php/hum/article/view/1109.