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