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Copyright (c) 2019 Rahmat Satya Nugraha, Doni Prakasa Eka Putra

This work is licensed under a
Creative Commons Attribution-ShareAlike 4.0 International License.
Copyright of Riset Geologi dan Pertambangan (e-ISSN 2354-6638 p-ISSN 0125-9849). Publish by BRIN Publishing (Penerbit BRIN)


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