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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jil.10.2.p.128-137
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.300491/tapiannauli.v5i2.196
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.300491/tapiannauli.v6i1.208