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2. Automobile Pollution;Agarwal,1991
3. Aqueous Environmental Geochemistry;Langmuir,1997
4. USEPA, Air quality Criteria for Particulate Matter, United States Environmental Protection Agency, Research triangle, NC, Environmental Criteria and Assessment office, Rep. EPA/600/P-95/001aF, 1996.
5. US EPA, National Air Toxics Program, The Integrated Urban Strategy, United States Environmental Protection Agency's, Federal Reg. 64 (137) 1999a, http://www.epa.gov/ttnatw01/urban/pre.html.