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Indri Eka Putri, EPI and Herman Anis, HRM and Bunga Dara Amin, BDA and Palloan Pariabti, PPL (2017) The Implementation Of Problem Based Learnin g Model Toward Conceptual Understanding At Senior High School. Proceeding The 3rd International Seminar on Science Education (ISSE) 2017, 3 (-). pp. 120-123. ISSN 2476-9533