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Simatupang J, Simatupang AEC, Nababan MBP. Analysis of Technical Efficiency in Oil Palm Plantations . j.sos.ekon.pertan. [Internet]. 2025 Aug. 11 [cited 2026 Jul. 22];21(1):131-44. Available from: https://journal.unhas.ac.id/index.php/jsep/article/view/46205