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Yusuf, Hudi, & Ratna Dewi.
" PENGUJIAN PERATURAN PRESIDEN NO. 109 TAHUN 2022 TENTANG FLIGHT INFORMATION REGION JAKARTA DAN FLIGHT INFORMATION REGION SINGAPORE." <em>Kertha Semaya : Journal Ilmu Hukum</em> [Online], 12.11 (2024): 2905-2915. Web. 28 Aug. 2026