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.12 J. H. Ludwig, D. R. Diggs, H.E. Hesselberg, and J. A. Mags, "Survey of Lead in the Atmosphere of three Urban Communities: A Summary,"American Industrial Hygiene Association Journal 26, 270 (1965); The Working Group on Lead Contamination, Public Health Service Publication No. 999-AP-12, "Survey of Lead in the Atmosphere of Three Urban Communities" (U.S. Dept, of Health, Education, and Welfare, 1965) 13* R. I. Larsen, "Air Pollution from Motor Vehicles," Annals of the Nev; York Academy of Sciences 136, 275 (1966). 14. R. E. Waller, B. T. Commins, and P. J. Lawther, "Air Pollution in Road Tunnels," British Journal of Industrial Medicine 16, .250 (1961). 15. J. M. Colucci .and C. R. Begeman, "The Automotive Contribution to Air-Borne Polynuclear Aromatic Hydrocarbons In Detroit," Journal of the Air Pollution Control Association JL5, 113 (196.5). 16. J. M. Coluc.ci and C. R. Begeman, "Carcinogenic Air Pollutants in Relation to Automotive Traffic in New York," APCA Paper No. 68-71, presented at the 6lst Annual Meeting of the Air Pollution Control Association, St. Paul, Minnesota, June 1968. 17. J- M. Colucci and C. R. Begeman, "Polynuclear Aromatic Hydrocarbons and Other Pollutants in Los Angeles Air," presented at the Second International Clean Air Congress, Washington, December 1970. 18. R. H. Daines, H. Motto, and D. M. Chilko, "Atmospheric Lead: Its Relationship to Traffic Volume and Proximity to Highways," Environmental Science and Technology 4, 318 (1970). 19. P. R. Atkins, "Lead in a Suburban Environment," Journal of the Air Pollution Control Association 19, 591 (1969)- 20. H. W. Georgii and D. Jost, "On the Lead Concentration in an Urban Aerosol," Atmospheric Enviroament 725 (1971). Laboratory Measurements on Aerosols from Vehicles 21. C. R. Begeman, "Carcinogenic Aromatic Hydrocarbons in Automobile Effluents," Paper No. 440C presented January 1962 at the SAE Automotive Engineering Congress, published in SAE Technical Progress Series, Vol. 6, "Vehicle Emissions," New York: Society of Automotive Engineers Inc., 1964. 22. D. Hoffmann, E. Theisz, and E. L. Wynder, "Studies on the Carcinogenicity of Gasoline Exhaust," Journal of the Air Pollution Control Association 1, 162 (1965). 14 3000 0623 PRODUCED PY Fnon