"United States. Environmental Protection Agency. Emissions, Monitoring, and Analysis Division. Emissions Inventory Group." . . . . . . . . . . . . . . . . . . . . . . "Emissions inventory guidance for implementation of ozone and particulate matter national ambient air quality standards (NAAQS) and regional haze regulations"@en . . . . . . . . . . "United States. Environmental Protection Agency." . .