Vol. 4 No. 2 (2021)
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https://doi.org/10.24252/djps.v4i2.23461 Views: 664 / PDF Downloads: 96
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https://doi.org/10.24252/djps.v4i2.25212 Views: 520 / PDF Downloads: 459
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https://doi.org/10.24252/djps.v4i2.24689 Views: 691 / PDF Downloads: 161