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5^th World Congress on Engineering and Applications (WCEA – 2020) BANGKOK, 14 -16 DECEMBER, 2020

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5^th International Conference on Business Management, Economics, Social Sciences and Humanities (BMESH – 2020), BANGKOK, 14 -16 DECEMBER, 2020

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2^nd Congress on Business Management, Economics, Social Sciences and Humanities - (CMESH - 2020), LAS VEGAS, USA, 14 - 16 SEPTEMBER, 2020

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2^nd International conference on Modeling, Analysis and Optimization (MAO – 2020), LAS VEGAS, USA, 14 -16 SEPTEMBER, 2020