Document Ra5oajYZ65VkXyM0jeBbBLyBn

'' 1 ) 'V;i ! V-' yJ/ 23. C. R. Begeman and J. M. Colucci, "Polynuclear Aromatic Hydrocarbon Emissions from Automotive Engines," SAE Paper No. 700469, presented at mid-year meeting, Detroit, May 1970. 24. C. R. Begeman and J. M. Colucci, "Benzota}pyrene in Gaso line Partially Persists in Automobile Exhaust," Science 161, 271 (1968). 25. D. A. Hirschler, L. F, Gilbert, R. W. Lamb, and L. M. Niebylski, "Particulate Lead Compounds in Automobile Exhaust Gas," Industrial and Engineering Chemistry 49, 1131 (1957); D. A. Hirschler and L. P. Gilbert, "Nature of Lead in Automobile Exhaust Gas," Archives of Environmental Health 8, 297 (1964). 26. P. K. Mueller, -H. L. Helwig, A. E. Alcocer, W. K. Gong, and E. E. Jones, "Concentration of Fine Particles and Lead in Car Exhaust," ASTM Special Publication No. 352, Symposium on Air-Pollution Measurement Methods, presented at the Fourth Pacific Area National ASTM Meeting, Los Angeles, 5 October 1962 (published 1963 by ASTM). 27. K. Habibi, "Characterization of Particulate Lead in Vehicle Exhaust -- Experimental Techniques," Environmental Science and Technology^, 239 (1970); also the accompanying commen taries by P. K. Mueller and H. C. McKee. 28. K. Habibi, E. S. Jacobs, W. G. Kunz, Jr., and D. L. Pastell, "Characterization and Control of Gaseous and Particulate Exhaust Emissions from Vehicles," presented at the Fifth Technical Meeting of the West Coast Section of the Air Pollution Control Association, San Francisco, October 1970; K. Habibi, "Automotive Particulate Emissions and Their Control," SAE Paper No. 710638, presented at Joint Meeting of SAE Mid-Michigan Section and American Chemical Society . Midland Section, Midland, Michigan, October 1970. 29. K. T. Whitby, Generation and Decay of Small Ions (University of Minnesota Particle Laboratory Publication No. 137> July 1969), Section VI. 30. J. S. Ninomiya, W. Bergman, and B. H. Simpson, "Automotive Particulate Bnissions," presented at the Second International Clean Air Congress, Washington, December 1970. 31. J. B. Moran and 0. J. Manary, U.S. Government Report PB 196783, "Effect of Fuel Additives on the Chemical and Physical Characteristics in Automotive Exhaust," Interim Report from The Dow Chemical Company to the National Air Pollution Control Administration, July 1970. 15 BbOb 5629 ' PRODI TCRn RV CTiD n