د/ صالح عبدالله السالمي . . . . د. ص. ع. ا. (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(08). https://doi.org/10.64295/cujahr.v8i08.83