Vol. 1 No. 2 (2018)
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https://doi.org/10.24252/djps.v1i2.11336 Views: 1167 / PDF Downloads: 413
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https://doi.org/10.24252/djps.v1i2.11337 Views: 2144 / PDF Downloads: 996
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https://doi.org/10.24252/djps.v1i2.11460 Views: 1181 / PDF Downloads: 705