Marlan, Sitinjak W, Marpaung Y. ANALISIS PENDAPATAN USAHA TANI JAHE KECAMATAN PEMATANG PURBA KABUPATEN SIMALUNGUN. JAK [Internet]. 2021 Aug. 9 [cited 2024 May 16];3(2):89-97. Available from: https://jurnal.usi.ac.id/index.php/agrilink/article/view/299