Riyandi M, Harahap MY. The Legal Force of Riau Governor’s Decree No. Kpts.482.a/XI/1987 on State Land Possession Under Government Regulation No. 20 of 2021: A Study of Decision No. 55/Pdt.G/2023/PN Rhl . J Legal, Brief, Legal Brief [Internet]. 2026 Aug. 18 [cited 2026 Aug. 21];15(3):392-40. Available from: https://legal.isha.or.id/index.php/legal/article/view/1662