Rahmatullah, R., Bahtiar, B., & Maimun, M. (2023). Development of Contextual Physics Teaching Materials Assisted by Virtual Lab Based-Android as Alternative Learning in Covid-19 Pandemic. Jurnal Penelitian Pendidikan IPA, 9(5), 4015–4021. https://doi.org/10.29303/jppipa.v9i5.2468