Harris, M., L.L.F. Scott, L.M. Nguyen, and L.C. Haws. 2007. Trends in elevated blood lead levels of U.S. children and associated demographic characteristics. Ann Epidemiol 17:748.
Harris, M., L.L.F. Scott, L.M. Nguyen, and L.C. Haws. 2007. Trends in elevated blood lead levels of U.S. children and associated demographic characteristics. Ann Epidemiol 17:748.