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http://kimia.unnes.ac.id/v1/2020/02/08/naftalina-ulik-the-second-runner-up-of-sustainability-challenge-of-the-engeneering-development-motivation-and-awareness-training-edmat-41/
Naftalina Ulik The Second Runner-Up of Sustainability Challenge of the Engeneering Development, Motivation, and Awareness Training (EDMAT-41)