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DOI: https://doi.org/10.33019/promine.v5i1.112 Abstract views: 669 , pdf downloads: 4114
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DOI: https://doi.org/10.33019/promine.v5i1.113 Abstract views: 550 , pdf downloads: 9284
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DOI: https://doi.org/10.33019/promine.v5i1.114 Abstract views: 598 , pdf downloads: 1449
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DOI: https://doi.org/10.33019/promine.v5i1.115 Abstract views: 432 , pdf downloads: 1142