“Determination of the Rotation Curve of the Milky Way Using the 21 cm Hi Emission Line”, Iraqi Journal of Science, vol. 58, no. 2C, pp. 1169–1176, Jan. 2022, Accessed: May 18, 2024. [Online]. Available: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/6010