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2. 40 CFR, 1993. Code of federal regulations, Part 50, Appendix J. Reference Method for the Determination of PM10 in the Atmosphere. Revised as of 1 July 1993. Office of the Federal Register, National Archives and Records Administration, Washington DC
3. 40 CFR, 1994. Code of federal regulations, Part 60, Appendix A, Method 26. Determination of Hydrogen Chloride Emissions from Stationary Sources. US Government Printing Office, Washington DC
4. Barnes, D.G., 1989. Interim Procedures for Estimating Risks associated with Exposures to Mixtures of Chlorinated dibenzo-p-dioxins and dibenzofurans (CDDs and CDFs) and 1989 Update. US Environmental Protection Agency, Risk Assessment Forum, Washington DC, EPA /625/3-89/016 (NTIS PB90-145756), March 1989
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