Permana, Sendi, Pukarda Jordan Siburian, Darwin Parlaungan Lubis, M Ridha Syafii Damanik, M Taufik Rahmadi, and Vladimir Ryabtsev. 2023. “Spatial Structure Analysis in Regional Development Context at Samosir Regency”. Tunas Geografi 12 (2):163-81. https://doi.org/10.24114/tgeo.v12i2.47494.