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journal, journal 2019. PDF STUDI TENTANG KOPERASI PERKEBUNAN KELAPA SAWIT RAKYAT BERPRESTASI DI INDONESIA Study of the Achievement Cooperative on Smallholder Oil Palm Plantation in Indonesia: Suharno, Yuprin A.D dan Trisna Anggreini. Agrienvi: Jurnal Ilmu Pertanian. 11, 02 (Sep. 2019), 33–39.