01447nam 2200385Ia 450 991069721550332120090316104933.0(CKB)5470000002386771(OCoLC)315826344(EXLCZ)99547000000238677120090316d2004 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierThe EPA particulate matter research program[electronic resource] what have we learned about PM since 1997? : executive summaryWashington, DC :U.S. Environmental Protection Agency, Office of Research and Development,[2004]54 pages digital, PDF fileTitle from title screen (viewed on Mar. 16, 2009)."July 2004.""EPA 600/S-04/057."Includes bibliographical references (page 54).EPA particulate matter research program ParticlesEnvironmental aspectsUnited StatesAirPollutionResearchUnited StatesParticlesEnvironmental aspectsAirPollutionResearchUnited States.Environmental Protection Agency.Office of Research and Development.GPOGPOBOOK9910697215503321The EPA particulate matter research program3467357UNINA