د/ صالح عبدالله السالمي د/ صالح عبدالله السالمي (2025) “A quantitative study of the effectiveness of the tax system in increasing general budget revenues in Yemen during the period (1990-2015 AD)”., Civilization University Journal of Applied and Humanitarian Researches, 8(11). doi:10.64295/cujahr.v8i08.83.