DEWI, S. H.; HARYANI, S.; SULISTYANINGSIH, T. Chemistry Practicum Learning During the Covid-19 Pandemic: Determining the pH Scale of Acid-Base Natural Indicators with Semi-Quantitative Analysis Using Spectrum Color Measure Software. International Conference on Science, Education, and Technology, [S. l.], v. 7, n. 1, p. 551–557, 2023. Disponível em: https://proceeding.unnes.ac.id/ISET/article/view/2013. Acesso em: 18 may. 2024.