chemical Oxidants and Precursors"; EPA-450/2-77-021a, Nov 1977.(2) U.S. EPA, "Procedures for Quantifying Relationships between Photochemical Oxidants and Precursors: Supporting Documentation"; EPA-450/2-77-021b, Feb 1978.(3) U.S. EPA, "Guideline for Use of City-Specific EKMA in Preparing Ozone SIPs"; EPA-450/4-80-027 Mar 1981. (4) Trijonis, J.; Mortimer, S. "Analysis of Historical Ozone Trends in the Los Angeles Region Using the EKMA Iso-pleth Model"; report prepared for EPA by Santa Fe Research Corp., Mar 1981.
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