Banoeari, Annisa Tri, Department of Chemistry, Faculty of Mathematics and Natural Sciences, State University of Medan (Indonesia)
Bariyah, Shohihatun, Universitas Negeri Medan (Indonesia)
Barubara, Astrida J.A., Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)
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)

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