Suryelita, Suryelita, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padang State University (Indonesia)
Susanti, Nora, Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan, Jl. William Iskandar Psr V. Medan Estate Medan
Susanti, Nora, Chemistry Departement, Universitas Negeri Medan (Indonesia)
Susanti, Nora, Department of Chemistry, Faculty of Mathematics and Sciences, Universitas Negeri Medan, Medan, Indonesia
Sutiani, Ani, Department of Chemistry, Universitas Negeri Medan (Indonesia)

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