Murasmita, A., Meirina Mulia W, Maria Galuh K, Dita Eka N and Ervina Rosmarwati 2023. Differences in Facial Skin Acidity Levels of Nurses in Sebelas Maret University Hospital, Before and After Surgical Mask Use During the COVID-19 Pandemic . Bioscientia Medicina : Journal of Biomedicine and Translational Research. 7, 12 (Nov. 2023), 3851-3854. DOI:https://doi.org/10.37275/bsm.v7i12.897.