Yanti, Pepi Helza, and Akmal Muhktar. “KARAKTERISASI LEMPUNG ALAM DESA GEMA TERAKTIFASI FISIKA”. CHEMISTRY PROGRESS 8, no. 1 (December 13, 2019). Accessed November 22, 2024. https://ejournal.unsrat.ac.id/v3/index.php/chemprog/article/view/9396.