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2. ArcView 3.0a, 1997. The software for figure 3 was ArcView 3.0 with the Spatial Analyst 3D Analyst (ESRI, Redlands, CA, USA), Xtools (Oregon Department of Forestry, OR, USA), and Spatial Tools extensions (USGS).
3. Reductions in dietary lead exposure in the United States;Bolger;Chem. Spec. Bioavail.,1991
4. Blood lead levels in the U.S. Population: Phase 1 of the Third National Health and Nutrition Examination Survey (NHANES III, 1988 to 1991);Brody;J. Am. Med. Assoc.,1994