A spatial analysis of mental retardation of unknown cause and maternal residence during pregnancy. Geospatial Health, [S. l.], v. 2, n. 2, p. 173–182, 2008. DOI: 10.4081/gh.2008.241. Disponível em: https://www.geospatialhealth.net/gh/article/view/241. Acesso em: 2 jul. 2025.