Marpomari Mahulae PJ. DESKRIPSI PERMASALAHAN UPAYA PENGEMBANGAN PARIWISATA BERKELANJUTAN DI DANAU TOBA SUMATERA UTARA(PROBLEM DESCRIPTION OF SUSTAINABLE TOURISM DEVELOPMENT EFFORT ON TOBA LAKE NORTH SUMATERA). Inovasi [Internet]. 2019 May 23 [cited 2025 Jun. 15];16(1):11-20. Available from: http://jurnal.bappelitbang.sumutprov.go.id/index.php/inovasi/article/view/130