PROFESSOR/ KHALAFALLAH AHMED MOHAMED ARABI; PROFESSOR/ SALAH MOHAMED IBRAHIM AHMED; MS. MAWADA MUSTAFA YOUSEF. Factors Affecting Productivity in Sudan During the Period (1970-2019). White Nile Journal for Studies and Research, [S. l.], n. 27, p. 56–73, 2026. Disponível em: https://journals.wnu.edu.sd/index.php/wnjsr/article/view/92. Acesso em: 13 jun. 2026.