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Rahmah, Siti, Department of Chemistry, Faculty Of Mathematics annd Natural Sciences, State University of Medan, (Indonesia)
Rahmah, Siti, Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Negeri Medan (Indonesia)
Rahmah, Siti, Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan (Indonesia)
Rahmayani, Putri, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)
Rajagukguk, Mega Evelin, Organic Chemistry Laboratory, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara (Indonesia)
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