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Copyright (c) 2016 Dina Mulya Siltri, Yohandri Yohandri, Zulhendri Kamus Zulhendri Kamus

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

 

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.