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Sinambela, Masdiana and Barus, Alex T. and Manurung, B. and Wahyuningsih, Hesti (2023) GASTROPODS AS MARKERS IN BABURA RIVER AT NORTH SUMATRA. European Chemical Bulletin, 12 (1). pp. 2491-2503. ISSN ISSN 2063-5346

Sugiharti, Gulmah and Anugrah, Ade Nur (2023) THE INFLUENCE OF PROBLEM-BASED-LEARNING MODELS AND MACROMEDIA FLASH TO INCREASE CHEMISTRY LEARNING ACTIVITIES AND RESULTS. European Chemical Bulletin, 12 (6). pp. 146-158. ISSN ISSN 2063-5346