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This work is licensed under a Creative Commons Attribution 4.0 International License.
Audyva Natasha
(1)(2) FMIPA, Universitas Negeri Medan, Indonesia
Indonesia
(1)(2) FMIPA, Universitas Negeri Medan, Indonesia
Retno Dwi Suyanti
(1)(2) FMIPA, Universitas Negeri Medan, Indonesia
Indonesia
(1)(2) FMIPA, Universitas Negeri Medan, Indonesia
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