Lahti, S., Rusanen, J., Kärkkäinen, S., Kortelainen, S., & Hausen, H. (2004). GIS and areal variation in dental caries – contribution of socio-economic factors among 6-year-olds in Kemi, Finland. Nordia Geographical Publications, 33(2), 1–8. Retrieved from https://nordia.journal.fi/article/view/76226