Dewi, S. H., Haryani, S., & Sulistyaningsih, T. (2023). 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, 7(1), 551–557. Retrieved from https://proceeding.unnes.ac.id/ISET/article/view/2013