Yani, R. W. E., Palupi, R., Bramantoro, T., & Setijanto, D. (2019). Analysis of Calcium Levels in Groundwater and Dental Caries in the Coastal Population of an Archipelago Country. Open Access Macedonian Journal of Medical Sciences, 7(1), 134–138. https://doi.org/10.3889/oamjms.2019.013