01667oam 2200421 a 450 991069993780332120130510084505.0(CKB)5470000002406580(OCoLC)761956215(EXLCZ)99547000000240658020111122d2010 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierParticulate matter urban-focused visibility assessment[electronic resource] final documentResearch Triangle Park, NC :U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Health and Environmental Impacts Division,[2010]1 online resource (288 unnumbered pages) illustrations (some color), color map., charts (some color)Title from title screen (viewed Oct. 18, 2011)."July 2010.""EPA 452/R-10-004."Includes bibliographical references.Particulate matter urban-focused visibility assessment ParticlesEnvironmental aspectsUnited StatesVisibilityMeasurementAir qualityStandardsUnited StatesParticlesEnvironmental aspectsVisibilityMeasurement.Air qualityStandardsUnited States.Environmental Protection Agency.Health and Environmental Impacts Division.GPOGPOGPOBOOK9910699937803321Particulate matter urban-focused visibility assessment3479691UNINA