*) Jurnal Pendidikan Indonesia (JPI) is Accredited by The Ministry for Research, Technology and Higher Education (RISTEKDIKTI)
Nainggolan, Juliper, University of HKBP Nommensen, Medan, Indonesia, Indonesia
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JPI (Jurnal Pendidikan Indonesia) Vol. 11 No. 4 (2022): Desember - Articles
The Mastery of Science Concepts in Solving Physics Problems for Junior High School Students
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