1. Gunderson, E.C.; Witham, C.L. Determination of Inhalable Nonvolatile Salts in a Shower; SRI Project No. PYC-6631; SRI International: Menlo Park, CA, 1988.
2. Zhou, Y.; Benson, J.M.; Irvin, C.M.; Irshad, H.; Cheng, Y.S. Characterization and Inhalation Dose Estimation of Particles Produced during Showering; Presented at the 23rd Annual Conference American Association for Aerosol Research, Atlanta, GA, October 4–8, 2004; Poster 8PC1.
3. Health Effects from Exposure to Sulfate in Drinking Water Study; EPA-815-R-99-001; U.S. Environmental Protection Agency: Washington, DC, 1999.
4. Locating and Estimating Air Emissions from Sources of Chromium (Supplement) EPA-450/2-89-002; U.S. Environmental Protection Agency/Office of Air Quality Planning and Standards: Research Triangle Park, NC, 1989.
5. Laboratory Air Issues; A May 6, 2004 Memorandum to all EPA RTP Employees from William G. Laxton, Director, Office of Administration and Resources Management; U.S. Environmental Protection Agency: Research Triangle Park, NC, 2004.