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Sihombing, Junifa Layla, Department of Chemistry, Faculty of Mathematic and Natural Science, Universitas Negeri Medan
Sihotang, Reinhard P, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan
Sihotang, Sarah, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)
Silaban, Ramlan, Dapertemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan (Indonesia)
Silaban, Ramlan, Universitas Negeri Medan (Indonesia)
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