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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30734/jpe.v8i2.1721
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (184.379 KB) | DOI: 10.17977/um072v1i12019p34-45
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/82