Vol. 3 No. 1 (2020)
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https://doi.org/10.24252/djps.v3i1.14036 Views: 903 / PDF Downloads: 1608
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https://doi.org/10.24252/djps.v3i1.13896 Views: 671 / PDF Downloads: 1016 / PDF Downloads: 0
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https://doi.org/10.24252/djps.v3i1.14004 Views: 451 / PDF Downloads: 920