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Ramadan, E.M., Jumadi, J. and Rahmawati, D.U. 2020. Physics Online Learning Devices Based on Guided Discovery Model for High School Class X on Momentum and Impulse Material. Jurnal Penelitian & Pengembangan Pendidikan Fisika. 6, 2 (Dec. 2020), 163 - 172. DOI:https://doi.org/10.21009/1.06203.