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Pratiwi, Alfira Julian, Departmen of Chemistry, Faculty of Mathematics and Science, Universitas Negeri Medan (Indonesia)
Pratiwi, Alfira Julian, Department of Chemistry , Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)
Pratiwi, Alfira Julian, Department of Chemistry, Faculty Of Mathematic and Natural Sciences, State University Of Medan (Indonesia)
Pratiwi, Alfira Julian, Department of Chemistry, Faculty of Mathematics and Natural Sciences, State University of Medan (Indonesia)
Pratiwi, Dewi, Science Education Study Program, Biology Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, Indonesia (Indonesia)
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