Fitri Handayani Manalu, Randa Putra Kasea Sinaga. Efektivitas Program Pupuk Subsidi Bagi Kesejahteraan Petani di Desa Ujung Batu Kecamatan Barus Kabupaten Tapanuli Tengah : Penelitian . JERKIN [Internet]. 2025 Oct. 23 [cited 2026 May 8];4(2):8516-22. Available from: https://jerkin.org/index.php/jerkin/article/view/3251