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11 REFERENCES 1. Ortiz, L. W. et al: "Interim Report: Penetration of Respirator Filters by an Asbestos Aerosol." Hay 2, 1984 (Los Alamos National Laboratory). 2. Myhre. L. G.. R. D. Holden, F. W. Baumgardner and D. Tucker: Physiological Limits of Firefighters. Unclassified Report #ESL-TR-79-06, AFESC, Tyndall AFB, Florida (June 1979). 3. Raven. P. B. et al.: "Physiological Response to Pressure-Demand' Respirator Wear", Am. Ind. Hyg. Assoc. J. 43 (10): 773-781 (1982). 4. "Guide to Respirator Fit Testing" (1981). National Paint and Coating Association, Washington, D.C. 5. Liu, B. Y. U. et al: "In-Mask Aerosol Sampling for Powered Air Purifying Respirators." Am. Ind. Hyg. Assoc, j. 45(4):278-283 (1984). 6. U.S. Department of Health. Education and Welfare: N10SH / Manual of Analytical Methods, Second Edition. Volume I (April 1977). 7. National Institute for Occupational Safety and Health, Method 7400. February 15, 1984. 8. Adams, M. J. et al. "Cassette Extenders: Effects on Chrysotile Fiber Deposition and Concentration Measurements". Presented at the American Industrial Conference. May 24, 1983. 9. Snedecor, G. W. and W. G. Cochran: Statistical Methods. 7th Ed., Iowa State University Press, Ames, Iowa (1980). DUP 0907365