Vol. 3 No. 2 (2020)
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https://doi.org/10.24252/djps.v3i2.17926 Views: 1480 / PDF Downloads: 3121 / PDF Downloads: 0
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https://doi.org/10.24252/djps.v3i2.16477 Views: 496 / PDF Downloads: 610 / PDF Downloads: 0
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https://doi.org/10.24252/djps.v3i2.16478 Views: 509 / PDF Downloads: 1651