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DOI : https://doi.org/10.31539/spej.v6i1.5007
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DOI : https://doi.org/10.31539/spej.v6i1.4614
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DOI : https://doi.org/10.31539/spej.v6i1.4542
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DOI : https://doi.org/10.31539/spej.v6i1.4979
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DOI : https://doi.org/10.31539/spej.v6i1.4394
Abstract views: 59 , pdf downloads: 108