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Copyright (c) 2022 Devi Ananda Panjaitan, Sori Monang, Abdul Karim Batubara
This work is licensed under a Creative Commons Attribution 4.0 International License.
This work is licensed under CC BY 4.0
Copyright (c) 2022 Devi Ananda Panjaitan, Sori Monang, Abdul Karim Batubara
This work is licensed under a Creative Commons Attribution 4.0 International License.