01446nam 2200385 450 991070403990332120160330160337.0(CKB)5470000002437257(OCoLC)945700083(EXLCZ)99547000000243725720160330d2014 ua 0engurcn|||||||||txtrdacontentcrdamediacrrdacarrierAir quality and outdoor activity guidance for schools[Research Triangle Park, N.C.] :U.S. Environmental Protection Agency ;[Atlanta, GA] :Department of Health and Human Services USA, Centers for Disease Control and Prevention :School Flag Program,[2014]1 online resource (2 unnumbered pages) color illustrationsTitle from title screen (viewed on Feb 25, 2016)."August 2014."Revision of EPA document EPA-456/F-13-002.Air qualityStudentsHealth and hygieneUnited StatesAir quality.StudentsHealth and hygieneUnited States.Environmental Protection Agency,Centers for Disease Control and Prevention (U.S.),School Flag Program,GPOGPOBOOK9910704039903321Air quality and outdoor activity guidance for schools3273893UNINA