H.S, M., Raharto, S., & Agustina, T. (2015). PROSPEK PENGEMBANGAN KOMODITAS KOPI ROBUSTA DI PT. KALIPUTIH KECAMATAN LEDOKOMBO KABUPATEN JEMBER. JSEP (Journal Of Social And Agricultural Economics), 8(2), 11-24. Retrieved from https://jurnal.unej.ac.id/index.php/JSEP/article/view/2619