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Ratnawati, Syarifah, Madrasah Tsanawiyah Negeri 3 Aceh Barat, Aceh Barat, Indonesia
Refelita, Fitri, Jurusan Pendidikan Kimia Fakultas Tarbiyah dan Keguruan Universitas Islam Negeri Sultan Syarif Kasim 28293 Kota Pekanbaru
Ridwanto, Ridwanto, Department of Pharmacy, Universitas Muslim Nusantara Al Washliyah (Indonesia)
Riga, Riga, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padang State University, Padang (Indonesia)
Riga, Riga, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padang State University (Indonesia)
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