Influence Price, Production Rubber and Income on The Level of Welfare of Rubber Farmers in The Village Ranto Jior District River Right Regency Port Rock South. JMB [Internet]. 2024 Aug. 13 [cited 2025 Aug. 27];11(2):1291-305. Available from: https://jurnal.fe.umi.ac.id/index.php/JMB/article/view/899