Varina F, Hartoyo S, Kusnadi N, Rifin A. EFFICIENCY OF OIL PALM SMALLHOLDERS IN INDONESIA: A META-FRONTIER APPROACH. jma [Internet]. 2020 Nov. 30 [cited 2026 Jun. 6];17(3):217. Available from: https://journal.ipb.ac.id/index.php/jmagr/article/view/34144