[1]
S. Lahti, J. Rusanen, S. Kärkkäinen, S. Kortelainen, and H. Hausen, “GIS and areal variation in dental caries – contribution of socio-economic factors among 6-year-olds in Kemi, Finland”, NGP, vol. 33, no. 2, pp. 1–8, Jan. 2004.