Silitonga, Dita Indah Lorencia, Department of Chemistry, Faculty of Mathematics and Natural Sciences, State University of Medan (Indonesia)
Silitonga, Maria Yovinta, Department of Chemistry, Faculty of Mathematics and Natural Sciences, State University of Medan
Silitonga, Pasar Maulin, Universitas Negeri Medan (Indonesia)
Silitonga, Pasar Maulim, Department of Chemistry, Faculty of Mathematics and Sciences, Universitas Negeri Medan, Medan 20221, Indonesia (Indonesia)
Silitonga, Pasar M, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)

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