Noor Specialized Journal Website - https://www.noormags.ir en Planetary Retrograde Motion in a Treatise Attributed to Muʾayyad al-Dīn al-ʿUrḍī https://www.noormags.ir/view/en/articlepage/1782201/planetary-retrograde-motion-in-a-treatise-attributed-to-muayyad-al-din-al-urdi Mon, 21 Sep 2020 20:30:00 GMT