Suleiman Saleh A. The Threepenny Opera: The Ballad Opera and the Socio-political Criticism and Change. RADAB [Internet]. 2000 Jan. 1 [cited 2025 Sep. 10];41(59):28-55. Available from: https://edusj.uomosul.edu.iq/index.php/radab/article/view/33917