“Red terror Historical study of the Extraordinary Committee of the All-Russian (The Cheka) 1917-1922”, JSHA, no. 77, pp. 524–571, Jan. 2023, Accessed: Nov. 22, 2024. [Online]. Available: https://jcoart.uobaghdad.edu.iq/index.php/2075-3047/article/view/446