AKTUALISASI TUJUAN HIDUP MASYARAKAT BATAK TOBA DALAM MEWUJUDKAN KEMAJUAN DI KAWASAN DANAU TOBA (ANALISIS SOSIOLOGIS): ACTUALIZATION OF LIFE PURPOSES OF THE TOBA BATAK COMMUNITY IN REALIZING PROGRESS IN THE LAKE TOBA AREA (SOCIOLOGICAL ANALYSIS). JSN 2023, 9, 219-234.