Karim, Sayyid. "Abhas Fannya: al-Ist'mal al-Mutaghyr wa-'Intizam tawzi' al-Sut fi salat al-Ijtma'." Majallat al-Imarah 1, no. 2 (1939): 83-89. [French: "L'acoustique des salles de conférences." / English: "Technical Research: Multi-usage and Sound Distribution in Conference Rooms."]
Ibrahim Sayed Karim on behalf of Majallat al-Imarah