Manalu N, Suhartini. Lake Toba Local Potential Utilization as a Learning Resource for Biodiversity Topic. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2023 Oct. 25 [cited 2025 Jul. 23];9(10):8430-8. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/5069