Vol 2, No 1 (2021)

DOI: http://dx.doi.org/10.30870/gpi.v2i1

All articles in this issue (5 articles) were authored/co-authored by 14 authors from Asia and Europe regions that consists of 4 countries (Thailand 🇹🇭, Yemen 🇾🇪, Indonesia 🇮🇩, and Russia 🇷🇺)

Table of Contents

Articles

Jariya Thongbunma, Prasart Nuangchalerm, Sirilak Supakam
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1-9
Abdullah M. Al-Ansi, Askar Garad, Ahmed Al-Ansi
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10-26
Yao Lin, Pramote Danpradit
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27-38
Saiful Millah, Bibin Rubini, Indarini Dwi Pursitasari
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39-47
Frely Rahmawati, Aditya Rahman, Usman Usman
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48-59

FRONT MATTER (Cover, Editorial Board, Preface, Table of Contents)

FRONT MATTER (Cover, Editorial Board, ISSN, Preface, Table of Contents)
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BACK MATTER (Acknowledgment)

BACK MATTER (Acknowledgment)
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