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Shintawati Shintawati https://scholar.google.com/citations?user=ShysgqgAAAAJ&hl=en&oi=ao Politeknik Negeri Lampung Indonesia
Yatim R Widodo https://scholar.google.com/citations?user=UFA_DqMAAAAJ&hl=en&oi=ao Politeknik Negeri Lampung Indonesia
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