Sulastri, Siti, Suharjono ., and Herastuti Sulistyani. 2022. “The Effect of Tooth Brushing before and After Eating on Salivary PH of Elementary School Students”. International Journal Of Community Medicine And Public Health 9 (3):1237-41. https://doi.org/10.18203/2394-6040.ijcmph20220680.