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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jjpgsd.v12i1.61986
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrpd.v10n2.p87-96
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jppp.v8i2.68580