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Remsberg E.E., Lavery D., and Crawford B., "Optical constants for sulfuric and nitric acids", J.Chem. and Engin. Data, 19, 263-255 (1974). Richwine, L.J., M.L. Clapp, R.E. Miller, and D.R. Worsnop, "Complex refractive indices in the infrared of nitric acid trihydrate aerosols", Geo.Res.Lett. 22, 26252628 (1995). Shettle, E. P. and Volz, F. E., "Optical constants for meteoric dust aerosol models" in "Atmospheric Aerosols: Their Optical Properties and Effects", a Topical Meeting on Atmospheric Aerosols sponsored by the Optical Society of America and NASA Langley Research Center, Williamsburg, VA, 13-15 Dec. 1976. Shettle, E. P. and Fenn, R. W., "Models for the Aerosols of the Lower Atmosphere and the Effects of Humidity Variations on Their Optical Properties", AFGL-TR-79-0214, 20 Sept 1979, ADA085951. Sokolik, I.N., A. Andronova, and T.C. Johnson, “Complex refractive index of atmospheric dust aerosols”, Atmos. Env., 27A, 2495-2502 (1993). Spitzer, W. G. and Kleinman, D. 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