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B
Barutu, Zeny Afriska, Chemistry Department, Universitas Negeri Medan, Jl. Willem Iskandar, Pasar V, Medan 20221, Indonesia (Indonesia)
Bella, Fitrisia Krisa, Jurusan Teknik Sipil, Universitas Negeri Medan (Indonesia)
Boangmanalu, Srunika, Department of Chemistry, Faculty of Mathematics and Sciences, Universias Negeri Medan, Medan 20221, Indonesia (Indonesia)
Br Ginting, Gracia Tri Putri, Science Education Study Program, Biology Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, Indonesia (Indonesia)
Br Sembiring, Murna Sari, Pendidikan IPA, FMIPA Universitas Negeri Medan (Indonesia)
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